Carrier
42
LockoutInducer RPM out of band
Inducer not at commanded speed.
Walk 42 in Diagnose
2 plates — walk the one on the cabinet
First check
1 Prove inducer and the live code
Do not pull power — that clears the Carrier 59TP6 active code. Write 42. Is the inducer spinning on this call? Silent inducer is not a pressure switch. Condensate in the inducer, bad inducer, vent load. Often pairs with 31/32.
Expect: 120 VAC at the inducer on a heat call. Wheel turning.
If fail: 120 VAC missing → IFC / door switch / incoming power. Voltage + dead motor → inducer.
If pass: Inducer running + this code → trap, hose, switch, vent (step 2).
The rest of the walkthrough is Diagnose.
On the plates
- Condensate in the inducer, bad inducer, vent load. Often pairs with 31/32.
Plates that use 42
Same number, other makers
42 on Carrier is not the same code on these plates.