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Furnace error code 45

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Furnace error code 45

A furnace error code 45 is a potentially serious problem that needs to be addressed as soon as possible. It’s also important to check what caused the error to prevent it from happening again.

Error codes 45, 50, 51 and 55 all have something in common: they all happen when pipes in your HVAC system are frozen. These pipes can freeze for many reasons – for example, a heat shortage or faulty insulation.

This section will explain the furnace error code 45 and how to troubleshoot it.

Typically, the furnace error code 45 is a problem with the fan circuit board. The problem can be identified by locating a blown a fuse, tripped breaker, or open wire on the circuit board of the fan motor. If you locate any of these, you will need to replace them to solve the issue.

Furnace error code 45 is a problem with the gas valve. When cycling, the pilot stays lit, and the burner does not light. This could be caused by a faulty thermostat or wiring issues.

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