Coleman, At a Glance
Coleman Furnace Repair Guide
Common Coleman Furnace Problems and Troubleshooting
| Is your furnace... | The problem might be your... | What's wrong? | How you can fix it: |
|---|---|---|---|
| Not heating? | Circuit Breaker/Fuse | Most likely, either the electrical system providing your furnace’s power has shorted or the power switch has blown. | Try resetting your furnace’s circuit breaker. If it has blown, you will need to replace it. |
| Igniter | The furnace’s igniter might either be cracked or faulty. | Check the part for cracks, if it is then replace the igniter. If it isn’t cracked, use a multimeter to test for continuity. | |
| Cycling irregularly? | Thermostat | Your thermostat might be adjusting incorrectly, causing the furnace to cycle on and off too often. | If your thermostat has an adjustable calibration scale, adjust the heat anticipator. If this does not stabilize the unit, you may have to replace the thermostat. |
| Not blowing hot air? | Blower Motor | Your blower motor may have completely burnt out. If this doesn’t seem to be the case, then the connecting belt may have simply broken. | Test to see if power is reaching the motor. If it does, but isn’t running, the motor has likely failed. If the motor runs but air doesn’t move, the connecting belt has probably broken. You’ll have to replace the belt. |
| Blowing too much air? | Control Board | The control board regulates the amount of voltage that reaches each functioning part. If the relay that controls the blower motor has failed, it will continually send voltage to the motor. | Replace the control board. |
| Thermostat | The contact that controls the blower motor on your thermostat may be stuck closed, causing the blower motor to run continuously. | Use a multimeter to check for continuity. If it appears the thermostat is the issue, replace it. | |
| Leaking water? | Drain Pipe | ||
| Starting and then stopping shortly after? | Flame Sensor | Your furnace’s flame sensor monitors the burner, detecting whether a flame is present. If it is either defective or dirty, it will not be able to detect a flame. | If dirty, clean the sensor using a fine abrasive pad. If faulty, replace the flame sensor. |
How to Replace Your Air Filter
- Remove the access panel to your Coleman furnace
- Locate the air filter, it’s found in a slot near either the side or bottom of return air duct
- Remove the used air filter
- Insert the new air filter, ensure that the indicators are pointing in the correct direction
- Return the access panel to where it was
Get Quotes
How soon are you looking to buy?*
Coleman Furnace Error Codes
| Error Codes | What this means | How to fix it |
|---|---|---|
| Slow green flashing | Coleman furnace is operating normally. | N/A |
| Slow amber flashing | Normal operation with a call for heat. | N/A |
| Steady on red | There's a control failure. | Check control unit. |
| Rapid red flashing | There's a twinning error with incorrect 24V phasing. | Check the twinning wiring. |
| Rapid amber flashing | There's a low flame sense current. | Check and clean the flame sensor. If it's still an issue, check for proper gas flow. |
| One red flash | A flame's present with the gas turned off. | Check the gas valve. It could be leaky or slow closing. |
| Two red flashes | Pressure switch is stuck in the closed position. | Check if there is a faulty pressure switch or miswiring. |
| Three red flashes | Pressure switch is stuck in the open position. | Check if there is a faulty inducer, a blocked vent pipe, a broken pressure switch hose, or a faulty pressure switch. |
| Four red flashes | Limit switch is stuck while open. | Check for a a dirty filter, an improperly sized duct system, an incorrect blower speed setting, or a faulty blower motor. |
| Five red flashes | Rollout switch is stuck while open. | The rollout control is manually reset. Therefore, if it has opened, then check to see if the inducer is operating properly or there is an issue with the primary heat exchanger. |
| Six red flashes | Pressure switch cycle has locked out. | The furnace will lockout for one hour and then reset. |
| Seven red flashes | There's an ignition lockout due to too many retries. | The flame couldn't be established, check for a faulty gas valve, a dirty or defective flame sensor, a faulty hot surface ignitor, or a problem with the burner. |
| Eight red flashes | There's an ignition lockout due to repeated power recycles. | Check if there is low gas pressure, a dirty or defective flame sensor, or a faulty gas valve. |
| Nine red flashes | There's a grounding or line polarity issue. | Check the polarity at both the furnace and branch. |
| Ten red flashes | Gas continues to flow with no call for heating. | Check on the gas valve and the gas valve wiring. |
When to call a professional to repair your Coleman furnace
Who Should You Call?
Coleman’s Warranty Coverage
- A limited lifetime heat exchanger warranty covers all Echelon™ Series furnaces, a limited 10-year Completed Assurance™ warranty pledge, a limited 10-year parts protection warranty, as well as a limited 90-day labour warranty.
- The mid-range LX Series units include a limited lifetime heat exchanger warranty, a limited 5-year Complete Assurance™ warranty pledge, a limited 10-year parts protection warranty, as well as a limited 90-day labour warranty.
- Entry-level Comforteer™ models offer a limited lifetime heat exchanger warranty, a limited -year parts protection warranty, as well as a limited 90-day labour warranty.
Get Quotes
How soon are you looking to buy?*
