Carrier Error Code 32: Low Flame Sense
How to Fix Carrier Code 32
- Step 1: Check your furnace filter. A dirty filter restricts airflow, which can affect the burner flame. Replace it if needed.
- Step 2: Ensure the furnace's gas supply is turned on. Check the shut-off valve near the furnace and the main gas supply to your home.
- Step 3: Reset the furnace by turning off the power at the breaker for a minute, then turning it back on. If the error persists, call a qualified HVAC technician.
How to Reset Carrier Code 32
- Turn off the furnace power switch, usually located on or near the unit.
- Turn off the circuit breaker for the furnace. Wait 30 seconds.
- Restore power at the breaker and flip the furnace switch back on.
- Set the thermostat to call for heat. If the error code returns after 2-3 ignition attempts, the fault requires repair.
What does 32 mean?
The Carrier error code 32, or a blinking LED pattern indicating 'Low Flame Sense,' means the furnace's control board isn't detecting a stable flame after ignition. The furnace goes through its normal start-up sequence, the gas valve opens, and the burners light. However, the flame sensor, a small metallic rod in the flame, isn't sending a strong enough signal back to the control board to confirm the flame is present. Because the furnace cannot reliably verify the flame, it shuts down as a safety precaution.
This issue can stem from a few different problems, ranging from a dirty flame sensor to a more serious gas supply issue. Because gas furnaces are involved, it's important to address this issue promptly to ensure safe and reliable heating.
Affected Models
- Performance Series Furnace
- Comfort Series Furnace
- Infinity Series Furnace
- Performance Series
- Base Series Furnace
- Performance Boost Furnace
- Performance Boost 95 Furnace
- WeatherMaker 8000
- WeatherMaker 9300
- Infinity 80
- WeatherMaker Furnace
- 24ABC6 Air Conditioner
- 25HBC5 Heat Pump
- Performance Series Heat Pump
- Infinity Series
- Base Series
- Comfort Series
- Infinity Series Heat Pump
- Comfort Series Heat Pump
- Infinity 20 Heat Pump with Greenspeed Intelligence
- WeatherMaker Furnace
- Base Series Furnace
- Comfort 80 Gas Furnace
Replacement Parts
| Part | OEM Number | Est. Cost |
|---|---|---|
| Flame Sensor | KH42LZ010 | — |
| Gas Valve | EF32CW225 | — |
| Ignition Control Module | — | — |
Related Codes on Same Models
| Code | Description | Severity |
|---|---|---|
| 11 | No Previous Error | Info |
| 12 | Blower On After Power Up | Warning |
| 13 | Limit/Rollout Fault | Critical |
| 14 | Ignition Lockout | Critical |
| 21 | Gas Heating Lockout | Critical |
| 22 | Abnormal Flame | Critical |
| 23 | Pressure Switch Fault | Warning |
| 24 | Secondary Voltage Fuse | Warning |
| 31 | High Stage Pressure Fault | Warning |
| 33 | Limit/Rollout Switch Lockout | Critical |