Error code reference

Carrier Furnace Error Code 22

Abnormal flame-proving signal; flame is proved while gas valve is de-energized

Abnormal flame-proving signal; flame is proved while gas valve is de-energized. Inducer will run until fault is cleared.

First step from the service manual

Check for leaky gas valve or stuck-open gas valve.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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Get the full diagnostic procedure for 22.

Step-by-step tests with expected resistance, voltage, and continuity values
Wiring diagram references and connector pinouts from the OEM service manual
Verified part numbers when replacement is required

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M+ Max·Carrier furnace

22 on my Carrier furnace

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Abnormal flame-proving signal

From Service Manual 102616, p.28:

1.Check for leaky gas valve or stuck-open gas valve.

2.Measure control board supply voltage at the test points. Expected: 12 VDC and 5 VDC; a drop below 4.75 VDC on the logic rail points to a failed onboard regulator.

3.Inspect all connectors on the main control for corrosion, thermal stress, or backed-out pins. Reseat each connector with the power disconnected.

Part WPW10804018

Electronic control board

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First step from the service manual

Get the full diagnostic procedure for 22.

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