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2019 Coleman Furnace Repair2019-10-29T20:45:50-04:00

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Coleman Furnace Repair Guide 2019

(Updated for 2019)

Our comprehensive Coleman furnace repair guide is designed to help you troubleshoot any issues that your unit might have. From reading model error codes to common problems, replacing air filters, and more!

Please note, the following is for informational purposes only. Any servicing you attempt is at your own risk.

Coleman, At a Glance

Founded in 1923 by W.C. Coleman, the Coleman® Company has since become a leading manufacturer of heating and cooling products. This comprehensive Coleman furnace repair guide will help your troubleshoot any common issues that your furnace might experience.

An important tip to remember is to properly maintain the internal components of your furnace. One easy way to do this is to regularly replace your air filter. This ensures that vital components can function at their best for long-term success.

How to Replace Your Coleman 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

What’s Wrong With Your Coleman Furnace?

Common Furnace Problems and Troubleshooting

Before attempting any sort of repair, remember to shut off the power to your Coleman furnace completely.

Is your furnace... The problem might be your... What's wrong? How you can fix it:
Not heating? Circuit Breaker/Fuse Either the circuit breaker has shorted or the unit's fuse has blown. Reset the circuit breaker associated with your Coleman furnace. If it's still not heating correctly, you'll want to replace the fuse.
Igniter The igniter has cracked or become defective. Locate the igniter within your Coleman furnace and inspect the part for cracks. If it's damaged then you'll have to replace the part. Otherwise, test it with a multimeter for continuity to see if it's defective.
Cycling irregularly? Thermostat Your thermostat might be calibrated improperly and as a result, is adjusting incorrectly. Check to see if your thermostat has an adjustable calibration scale, if so then use this to adjust the heat anticipator. If this doesn't appear to work or you don't have a scale, replace the thermostat completely.
Not blowing hot air? Blower Motor The blower motor in your Coleman furnace is either burnt out or it's connecting belt has broken. You'll have to inspect the motor to see if power is reaching it. If it does but the motor continues to function incorrectly, then the blower motor has failed. However, if the motor continues to run, but the air still isn't moving, then the connecting belt has broken. Depending on the situation, you'll have to replace the motor or the belt.
Blowing too much air? Control Board The control board is experiencing difficulty. The board's relay that regulates how much voltage is sent to the blower motor is defective. You will have to replace the control board.
Thermostat The contact on your thermostat responsible for controlling the blower motor is defective. Use a multimeter to check for continuity, if the thermostat isn't working properly then replace it.
Starting and then stopping shortly after? Flame Sensor The flame sensor used to detect whether or not a flame is present requires attention. The sensor has become either dirty or defective. Use a fine abrasive pad to clean the sensor if it appears to be dirty. If it's defective then replace the sensor altogether.

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.
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 Get a Technician for Coleman Furnace Repairs

Although this comprehensive Coleman repair guide can help you troubleshoot the most common issues that your unit may experience, it’s always a good idea to contact a certified HVAC technician for complex problems. If your furnace stops producing an adequate amount of heat or begins to leak or drip, you should contact a trained professional immediately. These issues typically occur when there’s a broken internal component.

Who to Call For Coleman Furnace Repairs

It might be difficult at first to know who to call when your Coleman furnace starts to perform sub-optimally. Online consumer reviews are a great place to start. From these, you can learn about local HVAC contractors, the types of services they perform, as well as their potential prices. However, it’s important to remember that you can’t trust these reviews completely due to anonymity and biases.

So how can you guarantee that you’re getting trustworthy information? We can help! Our independent certification program connects Canadian homeowners with certified heating and cooling professionals in their area. The companies that we refer have met many criteria to ensure that your Coleman furnace receives the attention it deserves.

Coleman’s Warranty Coverage

Depending on the tier of Coleman furnace that you bought, the brand offers a range of warranty coverages to protect your investment best.

  • 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.

➤ Protect your Coleman furnace:  Register and access your Coleman furnace warranty here

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