Tempstar Heat Pump replacement in Greater Vancouver

A Tempstar heat pump that has run through fifteen Lower Mainland winters has moved a lot of moisture. Coastal air is damp and, closer to the water, salty. That combination works on an outdoor coil from the outside in — fin corrosion, then reduced airflow across the coil, then higher head pressure, then a compressor that runs hotter than it should for years before it finally quits.

The replacement conversation usually starts with a single repair quote. A compressor, a coil, a reversing valve. The part is available, the tech can install it, and the system will run again. The real question is whether spending that money on a system already deep into its service life makes sense when the rest of the components are the same age and the refrigerant it uses is on its way out of production.

This page walks through how HeatLand approaches a Tempstar heat pump replacement in Greater Vancouver and the Fraser Valley: what actually triggers the decision, what changes when you move to current equipment, what a correct installation includes, and what to expect on the day. Phone (604) 330-3812.

The failures that end a Tempstar heat pump, and the ones that don’t

Not every fault is terminal. A failed contactor, a bad capacitor, a defrost board, a low-voltage transformer, a stuck reversing valve solenoid — those are routine repairs and rarely a reason to replace an otherwise sound system. Those parts are commonly stocked or orderable and the labour is measured in hours.

The list that changes the math is short. A failed compressor. A leaking evaporator or condenser coil. A cracked or corroded-through refrigerant circuit that can’t be reliably brazed. A reversing valve body that has internally bypassed. Each of these is a sealed-system repair, which means recovery, replacement, evacuation, weighing in a charge, and a leak test — expensive labour on top of an expensive part.

What pushes it further is that these failures rarely arrive alone on an older unit. A compressor that burns out contaminates the line set and the indoor coil with acid. A proper repair then includes a line-set flush or replacement and a suction line drier, and the indoor coil may need to come out too. At that point you are rebuilding most of a system around one original outdoor cabinet.

So the question a HeatLand technician asks on site is not just “can this be fixed.” It is: what else in this system is the same age, what condition is the coil in, is the refrigerant still practically available, and what does the repair cost as a share of a new, properly sized, warrantied system. That conversation happens in front of the equipment, with the diagnosis explained, not over the phone.

How the coastal climate ages outdoor units here specifically

Pull the top off a fifteen-year-old outdoor unit in Steveston or White Rock and you often find aluminum fins that crumble at a fingertip and copper tubing with a green bloom on it. Salt aerosol carries inland further than people expect. Even a few kilometres back from the water, the marine layer keeps outdoor coils damp for long stretches of the year rather than drying them out between rains.

Corroded fins do two things. They lose surface area, so the coil rejects less heat in cooling and absorbs less in heating. And they shed material into the air path, which combines with cottonwood fluff, cedar debris and lawn clippings to build a mat that airflow can’t get through. The compressor compensates by running longer at higher pressure. Nobody notices until a summer heat stretch or a January cold snap, when the system simply can’t keep up.

The second climate factor is defrost. Our winters sit in the worst band for frost accumulation — hovering near freezing with high humidity, which coats an outdoor coil far faster than a dry prairie cold snap does. A Lower Mainland heat pump goes through many more defrost cycles per season than the same unit in a drier climate. That is more reversing valve actuations, more compressor starts and stops, and more thermal cycling on the coil over its life.

When we assess a Tempstar unit for replacement, coil condition and the mounting pad get a close look. A rusted-out base pan or a unit sitting in standing water on a settled pad tells you as much about remaining life as any pressure reading.

Refrigerant phase-down and what it means for your existing system

Refrigerants used in residential heat pumps have been on a regulated transition for years, moving toward lower global-warming-potential blends. This is a real constraint on repair decisions, and it works in a specific way that homeowners often misunderstand.

Your existing system does not become illegal. Nobody makes you replace it. What changes is production and import volume of the older refrigerant, which over time affects availability and what a service technician pays for it. Topping up a system that leaks becomes a less appealing plan when you are paying to put refrigerant into a circuit that will lose it again.

The second consequence matters more for repairs. New outdoor units are being built for the newer refrigerants, which run at different pressures and use different oils. You generally cannot pair a new outdoor unit designed for one refrigerant with an old indoor coil designed for another and expect a warrantied, properly performing system. Matched systems exist for a reason: the manufacturer tests the outdoor unit, indoor coil and metering device together and publishes the performance for that combination.

So if your Tempstar outdoor unit fails and the indoor coil is original, the practical path is usually replacing both. That is not an upsell, it is how the equipment is certified.

For what applies to your specific model and the refrigerant in it, check the data plate on the outdoor cabinet and have a licensed technician confirm. Regulations and availability shift, so verify current status rather than relying on what was true a few years ago.

Load calculation: why we don’t just match the old tonnage

The fastest way to install the wrong heat pump is to read the old data plate and order the same size. That number reflects whatever someone decided at the time, in a house that may since have had windows replaced, attic insulation topped up, a basement finished, or a wall opened up.

A proper heat loss and heat gain calculation looks at the building: floor area by storey, orientation, window area and glazing type, wall and attic insulation levels, air tightness, and the design temperatures for your specific area. Design conditions in the Fraser Valley are not the same as they are in Vancouver’s West End; the valley runs colder in an outflow event and hotter in a summer inversion.

Oversizing a heat pump costs you in three ways. It short-cycles, which is hard on the compressor and gives poor dehumidification in cooling — noticeable in our damp shoulder seasons. It runs at low load most of the time, where a single-stage unit is least efficient. And it costs more up front and often needs a larger electrical service.

Undersizing shows up on the coldest mornings as a house that never quite reaches setpoint and a backup heat source running constantly.

The calculation also determines your balance point — the outdoor temperature below which the heat pump alone can’t carry the load — and that drives how the backup heat is configured. HeatLand does this before quoting, not after. It takes longer than a walk-through, and it is the difference between equipment that fits your house and equipment that fits a rule of thumb.

What changes when you move from an older single-stage unit to current equipment

The most obvious change is that the new outdoor unit probably doesn’t run the way the old one did. Older residential heat pumps were largely single-stage: full output or off. Current equipment is commonly two-stage or fully variable-speed inverter-driven, which means the compressor modulates its output to match the load.

In practice you notice long, quiet, low-speed runs instead of loud starts and stops. The house holds temperature more evenly because the system is trickling heat in continuously rather than blasting and coasting. Humidity control in cooling improves for the same reason — longer runtimes at lower airflow pull more moisture out.

The second change is cold-weather capability. Newer cold-climate heat pumps hold a much larger share of their rated heating capacity at low outdoor temperatures than equipment from a decade or more ago. For our climate, where genuinely cold days are a small slice of the season, this can substantially change how often backup heat runs. Look at the manufacturer’s published capacity tables at low ambient for the exact model rather than a marketing claim.

Third, controls change. Variable-speed systems typically need a matching communicating thermostat and a compatible indoor unit. Your existing thermostat almost certainly won’t carry over.

Fourth, sound. Variable-speed outdoor units at part load are considerably quieter than an old single-stage condenser. That matters if you are in a townhouse or a strata with noise provisions, or your unit sits under a neighbour’s bedroom window.

Efficiency is rated under systems like SEER2 and HSPF2. Ask for the AHRI certificate for the exact matched combination being quoted.

Backup heat: electric strips, existing furnace, or dual fuel

Every heat pump in this climate needs a plan for the coldest hours and for defrost cycles, when the outdoor unit briefly runs in reverse and the indoor side would otherwise blow cool air. How that plan is built depends on what is already in your home.

If your Tempstar heat pump was paired with an electric air handler, the backup is electric resistance heat strips inside that cabinet. Simple, reliable, and the most expensive form of heat to run. Sizing them correctly matters: too large and you have installed electrical capacity you rarely use, plus a bigger service requirement.

If you have a gas furnace with the heat pump sitting on top of it as an add-on, that is a dual-fuel system. The controls switch from heat pump to furnace below a chosen outdoor temperature. Setting that switchover point well is genuinely part of the install, not an afterthought — it determines how much of your season runs on the heat pump. Any work on the gas side is done by a TSBC-certified gas fitter.

If you are replacing an aging heat pump and an aging furnace at the same time, that is the moment to decide whether you want to stay dual-fuel or go all-electric. Going all-electric means the heat pump plus electric backup carries the whole load, which needs a hard look at your panel capacity and service size.

There is no universally right answer. It depends on your panel, your gas service, your comfort priorities and your building. We lay out the options with the tradeoffs stated plainly and let you choose.

Electrical: panel capacity, breakers, and the disconnect

Heat pump replacements stall on electrical more often than on anything else, and it is usually discovered late by contractors who didn’t check.

Three things get assessed. First, the branch circuit: the new unit has its own minimum circuit ampacity and maximum overcurrent protection printed on the data plate, and the existing wire gauge and breaker have to match. A larger new unit, or an air handler with bigger heat strips, can outgrow the existing conductors — and rewiring from panel to outdoor unit through a finished house is real work.

Second, total service capacity. Older Lower Mainland homes, especially pre-1980 stock, frequently have 100-amp services. Add an air handler with electric backup heat to a house that already has an electric range, dryer, hot water tank and maybe an EV charger, and a load calculation may show you are over. Options include a service upgrade, a smart electrical panel or load-management device, or keeping gas backup so the electric load stays modest.

Third, the outdoor disconnect. Code requires a means of disconnect within sight of the unit. Older installs sometimes have one that is corroded, undersized, or missing entirely.

All of this is checked during the site visit and priced into the written estimate, because finding it on install day means either a change order or a system that can’t be energized. Electrical work is done by a licensed electrician under permit where required, and inspected. If your panel is full or your service is marginal, we will tell you before you commit to equipment, not after.

Ductwork, static pressure, and why the old ducts may not carry a new system

A variable-speed air handler is more sensitive to duct problems than an old single-stage blower was, not less. The old blower brute-forced its way through restrictive ductwork at the cost of noise and efficiency. A modern ECM blower will ramp up to hit its airflow target and, past a point, throw an airflow fault or simply run at higher speed constantly.

So before quoting, a technician measures. External static pressure across the air handler, supply and return, tells you what the duct system is actually doing. High static means restriction: undersized returns, crushed flex, too many tight elbows, a filter rack that is too small, or a coil cabinet that necks down.

In a lot of Lower Mainland houses the return side is the problem. Older systems were built with a single central return that was adequate for a furnace moving less air than a heat pump needs in cooling mode. Heat pumps generally want higher airflow per unit of capacity than a gas furnace does, which makes an already-marginal return worse.

Common fixes are proportional to the problem: adding a second return, upsizing the return trunk, replacing crushed flex runs, going to a deeper filter cabinet with more media area, or reworking the plenum transitions at the equipment.

We also check duct sealing and whether ducts run through unconditioned crawlspaces or attics. In a wet coastal crawlspace, leaky ducts pull damp air into your system.

If duct modifications are needed, they appear as line items on the estimate with the reason attached.

Line set: reuse, flush, or replace

The refrigerant lines running between your outdoor unit and indoor coil are the one piece homeowners assume carries over. Sometimes it does. Often it shouldn’t.

The assessment is specific. Line diameter has to match what the new system requires — larger, more efficient units frequently call for a different suction line size than a fifteen-year-old unit used, and the manufacturer publishes those requirements along with maximum line lengths and vertical rise. Running the wrong diameter costs capacity and can cause oil return problems.

Condition matters next. Kinked sections, flattened runs, insulation that has degraded to crumbs in a crawlspace, or lines that were buried without proper protection all argue for replacement. Uninsulated or poorly insulated suction line in a damp crawlspace sweats, drips and rots whatever it sits on.

Contamination is the third factor. If the old compressor burned out, the line set holds acid and debris. Some manufacturers permit a flush with an approved agent plus a new liquid line drier; others require replacement outright for warranty. When we are moving to a different refrigerant with a different oil, residual mineral oil in an old line set is a genuine compatibility concern.

And when the line set is reused, it still gets a proper pressure test, a deep vacuum pull with a micron gauge, and a decay test — not a quick pull and a hope.

Whether your line set stays or goes is decided during the site assessment, documented in the estimate, and explained. It is a common place for a cheap quote to hide a corner being cut.

Permits, TSBC certification, and strata approval

Municipalities in Metro Vancouver and the Fraser Valley each run their own permitting, and requirements differ between Vancouver, Burnaby, Surrey, Richmond, Coquitlam, Langley and the rest. Generally, mechanical work of this scale and any associated electrical work are permitted and inspected. HeatLand pulls what your municipality requires and schedules the inspection.

Gas work is separate and non-negotiable. Any work touching a gas appliance, gas piping or venting in British Columbia must be done by a certified gas fitter under Technical Safety BC. If you are keeping a gas furnace as dual-fuel backup, or if the heat pump install involves the furnace at all, that certification applies. Ask any contractor for it and expect a straight answer.

Strata adds a layer. If you are in a townhouse or a low-rise with an outdoor unit on a patio, balcony or common-property roof, you almost certainly need written approval from the strata council before anything is installed. Bylaws commonly govern where a unit can sit, how it is mounted and anchored, whether penetrations through common property are allowed, and sound limits at the property line or a neighbour’s window.

Get that approval in writing before ordering equipment. Councils meet on their own schedule and a verbal nod from one member is not approval.

Municipal noise bylaws can also apply to detached homes with tight side yards. Setback from a property line and mounting method both affect measured sound. We factor placement into the site plan rather than putting the new unit wherever the old one happened to sit.

The site assessment: what a HeatLand technician actually does before quoting

A replacement quote that arrives without anyone measuring anything is a guess dressed up as a number.

Here is the sequence. We start at the existing outdoor unit: data plate details, coil condition, base pan, pad settling, clearances, drainage, and how the unit sits relative to windows and property lines. Then the electrical — the disconnect, wire size, breaker, and a look at the main panel with its existing loads.

Inside, we open the air handler or furnace cabinet: indoor coil condition, drain pan and condensate routing, blower type, filter rack size, and the plenum transitions. Static pressure gets measured with the blower running. We look at the return path and count returns per floor.

Then the building itself, for the load calculation: room-by-room dimensions, window count and type, insulation where it is visible, orientation, and any additions or renovations that changed the envelope.

We trace the line set where accessible and note its diameter, length, rise and insulation condition. Crawlspaces get inspected, not assumed. And we ask about the problems you actually live with — the bedroom that never gets warm, the upstairs that cooks in August — because those are duct and distribution issues that a new outdoor unit alone won’t fix.

Then you get a written estimate that names the exact equipment model numbers, the matched combination, the electrical scope, the duct scope, permits, and what is excluded. Free, no obligation, and nobody stands in your kitchen pressuring you to sign. (604) 330-3812.

Installation day: sequence, timeline, and what happens in your home

A straightforward heat pump changeout with no ductwork or electrical upgrades is usually a one-day job. Add a service upgrade, duct modifications or a line-set replacement through finished space and it becomes two days or more. You will be told which before we start.

Morning begins with protection — floor coverings on the path from the door to the equipment, and drop sheets around the work area. Then refrigerant recovery from the old system into a recovery cylinder, which is a legal requirement and takes time; it is not a step to rush.

The old outdoor unit comes out, then the indoor coil. New equipment goes in: outdoor unit set and levelled on a proper pad or stand with adequate clearance and drainage, new coil or air handler fitted, plenum transitions sealed, condensate drain run with a trap and routed to an approved point.

Refrigerant work follows. Brazing with nitrogen flowing to prevent internal oxidation, a pressure test, then a deep vacuum pulled to a target micron level with an isolated decay test to prove the system holds. Charge is weighed in per the manufacturer’s specification and then verified against operating conditions.

Electrical is connected, the new thermostat is mounted and configured, and the system is commissioned: airflow verified, subcooling and superheat checked, staging confirmed, defrost tested, and backup heat and switchover confirmed.

Then we walk you through it. Filter type and location, thermostat operation, what normal sounds like, and the paperwork. Cleanup includes hauling the old equipment away.

Living with a variable-speed heat pump: what feels different at first

The first week catches people off guard, and it is worth knowing in advance so you don’t call thinking something is wrong.

The outdoor unit runs a lot. Long, low-speed cycles that go on for hours are normal and are the whole point — the system is matching your home’s heat loss rather than overshooting and shutting off. It is not a sign of undersizing.

The air coming out of the supply registers feels cooler than furnace air. A gas furnace delivers noticeably hot air in short bursts. A heat pump delivers mildly warm air continuously. Hold your hand to a register and it may feel unimpressive while the room is perfectly comfortable. This is the single most common adjustment for homeowners switching from gas.

Defrost cycles look alarming the first time. On a damp winter morning the outdoor unit will stop, you may hear a distinct clunk from the reversing valve, and steam will roll off the coil. That is the unit melting frost off itself. It lasts a few minutes and then normal operation resumes.

Deep setbacks stop making sense. With a heat pump you generally want a steady setpoint rather than dropping it eight degrees overnight, because recovering from a big setback pulls in expensive backup heat. Small adjustments, or none.

And keep the filter clean. A restricted filter hurts a variable-speed system faster than it hurt your old one — check monthly during heating season and change on the schedule we give you at handover.

Warranty, maintenance, and protecting the investment in this climate

Manufacturer warranties on heat pump equipment typically split into parts coverage and separate compressor coverage, with terms that often depend on registering the equipment within a set window after installation. Register it. HeatLand will tell you what your specific equipment requires and how, but confirm the terms directly with the manufacturer’s warranty document for your model — coverage varies by product line and changes over time.

Two things void warranties more than anything else: improper installation and missing maintenance. Manufacturers can and do ask for service records. Keep your invoices.

What maintenance means here, specifically, is shaped by the coast. Outdoor coils need rinsing — gently, with the power off, from the inside out where accessible — because our combination of salt aerosol, cottonwood fluff and cedar debris blinds a coil faster than most climates. Keep vegetation cleared back to the manufacturer’s specified clearance; laurel hedges and heat pumps are a bad pairing.

Condensate drains need checking. A blocked drain in a damp crawlspace becomes a water problem quickly.

Professional service should include electrical connection checks, capacitor testing, refrigerant charge verification against operating conditions, defrost operation confirmation, blower and coil cleaning, and static pressure. Once a year is a reasonable baseline; twice if you are close to salt water or heavy tree cover.

If your system includes any gas-fired backup, that appliance needs its own combustion and venting inspection by a TSBC-certified gas fitter. If a CO alarm sounds or you smell gas at any point, get everyone out of the home and call the gas utility and a licensed technician from outside — never from inside the house.

Quick Checklist

• Read the model and serial number off the outdoor unit data plate and note the refrigerant type listed
• Get the actual diagnosis in writing — which component failed, and whether it is a sealed-system repair
• Ask for a heat loss and heat gain calculation for your home, not a size matched to the old unit
• Have the main electrical panel and service capacity assessed before choosing between gas backup and all-electric
• Request measured external static pressure and a return-air assessment, not a visual glance at the ducts
• Confirm in writing whether the line set is being reused, flushed or replaced, and why
• Get the AHRI certificate for the exact matched outdoor unit, indoor coil and thermostat combination quoted
• Secure written strata approval for outdoor unit placement, mounting and noise before ordering equipment
• Verify the contractor holds TSBC gas certification if any gas appliance or piping is involved
• Register the new equipment for warranty within the manufacturer’s stated window and keep every service invoice

Frequently Asked Questions

Reviewed by the HeatLand Heating & Cooling team — licensed, insured, TSBC-certified HVAC contractor serving Metro Vancouver & the Fraser Valley since 1999. Error codes, specifications, pricing and rebate programs vary by model and change over time; confirm details against your unit’s own manual, a written quote, and the manufacturer or CleanBC/FortisBC. If you smell gas or your CO alarm sounds, leave the home and call the gas utility and a licensed technician from outside.