Carrier Furnace Replacement in Ancaster After ECM Vent Motor Failure

A Sunday service call in Ancaster led to the replacement of a 23-year-old Carrier modulating furnace after a failed ECM vent motor made a major repair difficult to justify on an aging system.

AirPro Heating & Cooling was called to an Ancaster home to diagnose a furnace that was no longer operating properly. After testing the system, we found that the ECM vent motor had failed.

The furnace had originally been installed in 2003 and had been in service for approximately 23 years.

Because the estimated cost to replace the ECM vent motor was more than $2,000, the homeowner decided to compare the repair with the option of replacing the aging furnace.

Diagnosing the Carrier Furnace

The existing system was a Carrier 80,000 BTU modulating furnace that had been installed in 2003.

Unlike a conventional single-stage furnace, the existing system was designed as a modulating heating system and was paired with a modulating thermostat.

During the service call, AirPro inspected the furnace and tested its components to determine the cause of the problem.

The diagnosis was a defective ECM vent motor.

The vent motor is an important component of the furnace because it is responsible for moving combustion gases through the venting system and helping the furnace establish the proper operating conditions required for safe combustion.

In this case, the motor had reached the end of its service life.

The Repair Option

Replacing the failed ECM vent motor was possible, but the estimated repair cost was more than $2,000.

That created an important question for the homeowner:

Does it make sense to spend more than $2,000 repairing a furnace that was already approximately 23 years old?

There is no single answer to that question for every homeowner. A repair can make sense when the furnace is relatively young and otherwise in good condition.

However, when an expensive component fails on a furnace that has already been operating for more than two decades, it is reasonable to compare the cost of the repair with the cost and benefits of a new furnace.

After discussing the options, the homeowner decided to replace the furnace rather than invest more than $2,000 in the 23-year-old system.

Replacing a 23-Year-Old Furnace

AirPro removed the existing Carrier 80,000 BTU modulating furnace and installed a new KeepRite furnace.

Because the new furnace used a different control system, the existing modulating thermostat was not reused.

A new programmable thermostat was installed as part of the furnace replacement.

The thermostat replacement was necessary to provide the appropriate control for the new furnace rather than trying to retain the control equipment designed for the older Carrier modulating system.

Updating the Furnace Venting

The existing furnace installation used ABS venting for both the exhaust and combustion-air intake.

As part of the replacement, the furnace exhaust vent was changed to a ULC-S636-certified PVC venting system appropriate for the new furnace installation.

The existing ABS air-intake vent was retained because it remained suitable for the new installation.

This allowed the existing intake to remain in place while the furnace exhaust was updated as part of the new installation.

Why the Homeowner Chose Replacement

The homeowner's decision was not based on one issue alone.

The furnace had been installed in 2003 and was approximately 23 years old. The immediate problem was a failed ECM vent motor, and the estimated repair cost was more than $2,000.

Rather than put a significant amount of money into a furnace that had already provided more than two decades of service, the homeowner chose to invest in a new heating system.

For an older furnace, the age of the equipment is an important part of the repair-versus-replacement decision.

A failed motor does not automatically mean a furnace needs to be replaced. In many situations, repairing the failed component can be the right choice.

However, when the equipment is more than 20 years old and the required repair is expensive, it makes sense to consider the remaining service life of the furnace and the possibility of additional repairs in the future.

From an Older Modulating Furnace to a New Heating System

This replacement also illustrates why replacing an older furnace can involve more than simply disconnecting the old equipment and installing a new one.

The original system included:

• Carrier 80,000 BTU modulating furnace

• Modulating thermostat

• ECM vent motor

• ABS exhaust vent

• ABS combustion-air intake

• Furnace installed in 2003

The replacement included:

• New KeepRite furnace

• New programmable thermostat

• Updated ULC-S636 PVC exhaust vent

• Existing ABS combustion-air intake retained where suitable

The installation was completed based on the requirements of the new furnace and the existing site conditions.

Furnace Replacement in Ancaster, Ontario

This Ancaster service call started with what appeared to be a furnace repair problem: a failed ECM vent motor.

After diagnosis, however, the homeowner was faced with a repair costing more than $2,000 on a furnace that had been installed approximately 23 years earlier.

After considering the repair cost and the age of the equipment, the homeowner chose furnace replacement.

AirPro Heating & Cooling completed the replacement, including the new KeepRite furnace, programmable thermostat, and updated exhaust venting.

If you have an older furnace that requires an expensive repair, a professional diagnosis can help you understand the actual problem and compare the repair option with furnace replacement.

AirPro Heating & Cooling provides furnace repair and furnace replacement in Ancaster and surrounding Hamilton-area communities.