FieldBench
Rheem codes

Rheem

46

Lockout

Low PS open at LOW inducer speed

LPS did not close on low inducer. This is the VA low-fire / low-inducer half of the split TA never printed.

Walk 46 in Diagnose

3 plates — walk the one on the cabinet

First check

1 Prove inducer and the live code

Do not pull power — that clears the Rheem R951V active code. Write 46. Is the inducer spinning on this call? Silent inducer is not a pressure switch. Low-inducer LPS path, intake, trap, inducer low speed.

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

  • Low-inducer LPS path, intake, trap, inducer low speed.
  • Do not swap the 45 switch first because a TA chart said ‘45 is low.’

Plates that use 46