Heat Pump Running Constantly in Greater Vancouver

A heat pump that runs for extended periods without cycling off is not necessarily a problem — but understanding when continuous operation is expected versus when it signals an issue helps homeowners avoid unnecessary service calls.

What This Means

Heat pumps are designed to run long cycles, unlike furnaces that run short, high-intensity bursts. On very cold or very hot days, a heat pump may run nearly continuously to maintain setpoint — this is normal. What is not normal is running continuously without reaching setpoint, or running continuously in mild weather.

Common Causes

• Normal operation during peak demand (very cold or very hot weather)
• Thermostat setpoint too far below outdoor temperature — asking for more cooling than system can provide
• Refrigerant low — system running at reduced capacity and cannot reach setpoint
• Equipment undersized for the building heat or cooling load
• Air filter restricted — reduced airflow causes the system to run longer
• Thermostat set to ON (fan always on) rather than AUTO — fan runs continuously regardless of call for heating or cooling

What Homeowners Can Check Safely

• Check thermostat fan setting — should be AUTO, not ON, for normal operation
• Check and replace filter if overdue
• Assess whether today is unusually hot or cold — continuous operation during weather extremes may be normal

When to Call a Licensed Technician

Heat pumps contain refrigerant under pressure, electrical components at line voltage, and control systems that require specialized diagnostic tools. Do not open refrigerant circuits, bypass safety switches, or attempt to recharge refrigerant without proper certification.

• Refrigerant pressure testing to confirm adequate charge
• Airflow measurement to confirm filter and duct system are not restricting
• Equipment sizing assessment if system consistently cannot reach setpoint
• Thermostat calibration

Frequently Asked Questions

Is it expensive to run a heat pump continuously?

Heat pumps are significantly more efficient per unit of heat delivered than resistance heating. A heat pump that runs continuously during a cold day is still likely using less energy than a resistance heater running intermittently to deliver the same warmth. Continuous operation is not inherently expensive for a heat pump — it is the designed mode of operation during high demand.

My heat pump runs all day but the house is still not reaching the setpoint. What is wrong?

Inability to reach setpoint during operation suggests the system capacity is insufficient for the load. This can be from refrigerant loss (reducing capacity), a very dirty outdoor or indoor coil (reducing heat transfer), or genuine equipment undersize for the building. A technician can quickly determine which is the cause.

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