42
Moderate
Carrier · Central Air Conditioners & Furnaces
Inducer Motor Fault
Quick Answer
Error code 42 on your Carrier Central Air Conditioners & Furnaces means: Inducer Motor Fault. This is usually fixable — see the step-by-step guide below.
Likely Causes
How to Fix It
1
Verify 120VAC at the inducer motor leads during a call for heat
2
Check inducer motor capacitor if applicable
3
Inspect the inducer housing for cracks or damage
4
Check condensate drain for blockages that may be backing up into the inducer
5
A licensed HVAC technician should replace the inducer motor as it involves combustion venting
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Inducer motor assembly
Inducer motor gasket
Condensate drain trap
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