Daikin Air Conditioner Error Codes — Meanings, Causes & Repair in Greater Vancouver

Seeing a fault code on your Daikin air conditioner? This guide explains what the most common Daikin air conditioner error codes mean, what’s safe to check yourself, and when to call HeatLand’s licensed HVAC technicians for Daikin air conditioner repair across Metro Vancouver and the Fraser Valley.

The codes below apply across common Daikin models (FIT, DX series). Meanings follow Daikin’s documented fault codes — always confirm against your unit’s own manual, because exact wording can vary by model, control board and firmware.

How to read Daikin air conditioner error codes

On Daikin FIT and communicating inverter ducted systems sold in North America (which share the Goodman/ClimateTalk inverter platform), the outdoor control board displays a numeric fault code. On the outdoor PCB 7-segment display this appears as an 'E' followed by the number (for example fault 24 shows as 'E24'); the same number is reported by name on the Daikin communicating thermostat. These codes come from the official Daikin ClimateTalk unitary 'AC & HP' (outdoor unit / condenser) fault table.

Daikin air conditioner error codes & what they mean

These are the Daikin air conditioner codes our Greater Vancouver technicians see most. Anything marked pro repair involves electrical, refrigerant, sensor or control-board work that must be done by a licensed HVAC technician — never open the indoor/outdoor unit or refrigerant lines yourself.

Code	What it usually means	Common causes	Safe to check yourself
11	System Test required for start up (SYSTEM TEST incomplete or currently running). This is a message-only status, not a hardware fault pro repair	Incomplete SYSTEM TEST after installation; SYSTEM TEST is currently running	This is an installation/commissioning message; if the system is newly installed or was just serviced, allow the technician to complete the system test
12	General memory error on the outdoor control board pro repair	High electrical noise; Faulty control board	Turn the thermostat to off, then try a single power reset at the outdoor disconnect or breaker
13	Experiencing frequent high pressure faults (critical lockout) pro repair	Blocked or restricted condenser coil and/or lines; Stop (service) valve not completely open; Overcharged refrigerant	Make sure the outdoor condenser is clear of leaves, grass clippings, dirt, and obstructions blocking airflow; Check and replace a dirty air filter; Confirm nothing is restricting airflow around the outdoor unit
14	Experiencing frequent high pressure faults but acceptable to run (minor) pro repair	Blocked or restricted condenser coil and/or lines; Stop (service) valve not completely open; Overcharged refrigerant	Clear leaves, debris, and vegetation away from the outdoor condenser coil; Check and replace a dirty air filter
15	Frequent low pressure faults (critical lockout) pro repair	Stop (service) valve not completely open; Restriction in refrigerant lines; Low refrigerant charge	Check and replace a dirty air filter; Make sure supply and return vents are open and unobstructed
16	Frequent low pressure faults (minor) pro repair	Stop (service) valve not completely open; Restriction in refrigerant lines; Low refrigerant charge	Check and replace a dirty air filter; Make sure supply and return vents are open and unobstructed
17	Frequent compressor faults pro repair	Stop (service) valve not completely open; Compressor wire has lost phase; Compressor motor failure	Confirm the outdoor disconnect and breaker are on; Try a single power reset, then call a licensed technician if the code returns
18	Outdoor control board error pro repair	Outdoor fan motor not connected properly; Faulty control board; Electrical noise	Try a single power reset at the outdoor disconnect or breaker, then call a licensed technician if the code returns
19	Outdoor unit PCB or fan failure error pro repair	Obstruction in fan rotation; Outdoor fan motor not connected properly; Outdoor fan not running	Check the outdoor fan grille and clear any debris that could block the fan (with the power off at the disconnect); Confirm the outdoor breaker and disconnect are on
20	EEV coil is not connected (outdoor electronic expansion valve coil not connected) pro repair	Outdoor EEV coil is not connected; Faulty outdoor EEV coil	No safe homeowner check; this requires a technician to inspect the EEV coil wiring
21	Experiencing frequent low discharge superheat faults pro repair	Thermistors inoperable or improperly connected; Faulty indoor or outdoor EEV/EEV coil; Faulty indoor TXV	No safe homeowner check; this is an internal refrigerant-control fault for a technician
22	High discharge temperature error pro repair	Discharge thermistor inoperable or improperly connected; Discharge thermistor in incorrect position or off; Low refrigerant charge	Clear debris and vegetation from the outdoor condenser to improve airflow; Check and replace a dirty air filter
23	Discharge temperature sensor failure pro repair	Discharge thermistor inoperable or improperly connected	No safe homeowner check; the sensor and its wiring must be tested by a technician
24	High pressure switch is open pro repair	High pressure switch (HPS) inoperable; High system pressure from restricted airflow, dirty condenser, overcharge, or stop valve not fully open	Make sure the outdoor condenser coil is clear of leaves, dirt, and obstructions; Check and replace a dirty air filter; Try a single power reset, then call a licensed technician if the code returns
25	Outdoor temperature sensor error pro repair	Faulty or disconnected outdoor thermistor sensor	No safe homeowner check; the sensor must be inspected and tested by a technician
26	Pressure sensor not reacting properly pro repair	Low pressure sensor inoperable or not properly connected	No safe homeowner check; the pressure sensor and wiring must be checked by a technician
28	Outdoor coil temperature sensor error pro repair	Outdoor coil thermistor inoperable or not properly connected	No safe homeowner check; the sensor connection must be inspected by a technician
29	Liquid temperature sensor error pro repair	Liquid thermistor inoperable or not properly connected	No safe homeowner check; the sensor connection must be inspected by a technician
30	Control board may need to be replaced (communication/wiring fault to the control board) pro repair	Wiring to control board disconnected; Faulty control board; Electrical noise	Try a single power reset at the outdoor disconnect or breaker, then call a licensed technician if the code returns
31	High current leak pro repair	Improper ground; Faulty compressor	No safe homeowner check; this is an electrical-safety fault that must be diagnosed by a licensed technician
32	Outdoor unit control board high temperature fault (critical) pro repair	Ambient air conditions too high; Cooling bracket screws missing or loose (2-4 ton); Poor or missing thermal grease on control board cooling bracket (2-4 ton)	Make sure the outdoor unit has clearance and is not surrounded by obstructions that trap heat; Clear debris from around the condenser; Try a single power reset during cooler ambient conditions
33	Outdoor unit control board high temperature fault but acceptable to run (minor) pro repair	Ambient air conditions too high; Cooling bracket screws missing or loose (2-4 ton); Poor or missing thermal grease on control board cooling bracket (2-4 ton)	Make sure the outdoor unit has clearance and is not surrounded by obstructions that trap heat; Clear debris from around the condenser
34	Outdoor unit PCB detected a possible short circuit (current spike) pro repair	Current spike in supply; Stop valve not completely open; Compressor wire has lost phase	Try a single power reset at the outdoor disconnect or breaker, then call a licensed technician if the code returns
35	Outdoor unit PCB detected a high current condition pro repair	Short circuit condition; Stop valve not completely open; Overcharged refrigerant	Confirm the outdoor unit has proper installation clearances and is not blocked; Try a single power reset, then call a licensed technician if the code returns
36	Startup procedure error pro repair	Blocked or restricted condenser coil and/or lines; Compressor wire has lost phase; Inconsistent compressor load	Clear debris and vegetation from the outdoor condenser coil; Check and replace a dirty air filter
37	Control board error (outdoor) pro repair	Outdoor fan motor not connected properly; Faulty control board	Try a single power reset at the outdoor disconnect or breaker, then call a licensed technician if the code returns
38	Compressor voltage error pro repair	High or low voltage from supply; Compressor wire has lost phase; Faulty control board	Check whether other large appliances or the home are experiencing power/voltage issues; if so, contact the utility; Try a single power reset
41	Low refrigerant condition error pro repair	Refrigerant leak; Low refrigerant charge; Thermistors inoperable or not properly connected	No safe homeowner check; refrigerant must only be handled by a licensed technician
42	Low power supply voltage condition detected pro repair	Low line voltage supply	Check the circuit breaker and outdoor disconnect are fully on; If other lights/appliances are dimming or the whole home has low voltage, contact the utility
43	High power supply voltage condition detected pro repair	High line voltage supply	If a high-voltage condition is suspected across the home, contact the utility; do not open any electrical panels yourself
44	Recommended outdoor operational temperature is out of range (minor) DIY-checkable	Ambient air conditions too high or too low for the unit's operating range	This is usually a normal extreme-weather condition; cycle power and retry when outdoor temperatures are within the usable range
50	Voltage issue on the control board (see manual for troubleshooting info) pro repair	High or low voltage from supply; Faulty control board	Confirm the breaker and disconnect are fully on; if a home-wide voltage problem is suspected, contact the utility; Try a single power reset
51	Potential communication issues detected by the outdoor control board pro repair	Communication wiring disconnected	Try a single power reset at the outdoor disconnect or breaker, then call a licensed technician if the code returns
52	Experiencing frequent compressor faults but acceptable to run (minor) pro repair	Stop valve not completely open; Compressor wire has lost phase; Compressor motor failure	Confirm the outdoor disconnect and breaker are on; Try a single power reset, then call a licensed technician if the code persists
56	Suction temperature sensor failure pro repair	Suction thermistor inoperable or not properly connected; Obstruction inside ductwork	Check and replace a dirty air filter and make sure vents are open; Sensor wiring itself must be checked by a technician

Daikin air conditioner codes we get called for most

12 — General memory error on the outdoor control board

Typical causes include high electrical noise; faulty control board. A few things are safe to check yourself (Turn the thermostat to off, then try a single power reset at the outdoor disconnect or breaker), but the repair is a licensed HVAC technician job. HeatLand diagnoses and fixes 12 on Daikin air conditioners throughout Greater Vancouver.

23 — Discharge temperature sensor failure

Typical causes include discharge thermistor inoperable or improperly connected. A few things are safe to check yourself (No safe homeowner check; the sensor and its wiring must be tested by a technician), but the repair is a licensed HVAC technician job. HeatLand diagnoses and fixes 23 on Daikin air conditioners throughout Greater Vancouver.

17 — Frequent compressor faults

Typical causes include stop (service) valve not completely open; compressor wire has lost phase; compressor motor failure. A few things are safe to check yourself (Confirm the outdoor disconnect and breaker are on; Try a single power reset, then call a licensed technician if the code returns), but the repair is a licensed HVAC technician job. HeatLand diagnoses and fixes 17 on Daikin air conditioners throughout Greater Vancouver.

13 — Experiencing frequent high pressure faults (critical lockout)

Typical causes include blocked or restricted condenser coil and/or lines; stop (service) valve not completely open; overcharged refrigerant. A few things are safe to check yourself (Make sure the outdoor condenser is clear of leaves, grass clippings, dirt, and obstructions blocking airflow; Check and replace a dirty air filter), but the repair is a licensed HVAC technician job. HeatLand diagnoses and fixes 13 on Daikin air conditioners throughout Greater Vancouver.

Is it safe to keep running a Daikin air conditioner with a fault code?

Most Daikin fault codes put the air conditioner into a safe lockout for a reason. You can safely check the basics — the power and breaker on, the air filter clean, the outdoor condenser clear of debris, and the thermostat set to cool — and restart it once. If the code returns, stop and book a technician. Air-conditioner faults are electrical and refrigerant issues — never open the unit or touch the wiring or refrigerant lines yourself.

Daikin air conditioner repair across Greater Vancouver

HeatLand has kept Metro Vancouver homes comfortable since 1999. Our licensed, insured technicians diagnose and repair Daikin air conditioners — sensor and thermistor errors, communication faults, fan and compressor problems, refrigerant and pressure faults, and control-board issues — including units we didn’t install. We’re brand-agnostic, carry common parts, and give you an honest repair-or-replace assessment with upfront pricing and a free estimate. If your air conditioner is beyond economical repair, we’ll show you right-sized, high-efficiency replacement options and the rebates available.

Need it sorted fast? We offer priority emergency air conditioner repair. Explore Air Conditioner services, browse all air conditioner error codes by brand, or request a free estimate.

Daikin air conditioner service areas

We repair Daikin air conditioners across Greater Vancouver and the Fraser Valley, including:

Daikin air conditioner error code FAQs

Can I reset my Daikin air conditioner myself?

Yes — power-cycling the unit at the breaker once is generally safe after you’ve checked the basics (the power and breaker on, the air filter clean, the outdoor condenser clear of debris, and the thermostat set to cool). If the air conditioner faults again right away, stop and note the code — repeatedly resetting a air conditioner that keeps locking out can mask a real problem. Call a licensed HVAC technician to diagnose it.

What does the Daikin 17 code mean?

On Daikin air conditioners, 17 commonly indicates frequent compressor faults. Confirm the exact meaning against your unit’s manual — codes can vary by model and series — and have the repair done by a licensed HVAC technician. HeatLand fixes this across Greater Vancouver.

Do you repair Daikin air conditioners you didn’t install?

Yes. HeatLand is brand-agnostic and services Daikin air conditioners throughout Metro Vancouver and the Fraser Valley, whether or not we installed the unit. We carry common parts and give you an honest repair-or-replace assessment.

Is a Daikin air conditioner fault code an emergency?

No heat in cold weather or no cooling in a heat wave is worth treating urgently. For priority air conditioner repair across Greater Vancouver, call (604) 330-3812.

How much does Daikin air conditioner repair cost in Vancouver?

It depends on the fault. Many Daikin codes point to sensors, thermistors, capacitors or control parts — usually far cheaper than replacement. We give upfront pricing and a free estimate before any work.

More Air Conditioner error-code guides

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