Rheem R802VA07542117MSA Error Code A044_F: Inducer Lo Pressure Switch Won't Open
What Does Code A044_F Mean?
Fault code A044_F on the Rheem R802VA means the low-stage inducer pressure switch is remaining in the closed position when the inducer motor is off and the IFC expects it to be open. The pressure switch is a safety device that monitors the negative pressure created by the inducer draft motor in the flue passage. It should be open (no pressure) when the inducer is not running, and should close once the inducer builds sufficient draft.
When the switch is stuck closed before the inducer even starts, the IFC cannot confirm that the switch transitions correctly — which means it cannot verify proper draft creation during the pre-purge cycle. This prevents the furnace from attempting ignition safely.
Common causes include a mechanical failure inside the pressure switch itself (stuck diaphragm or welded contacts), a kinked or blocked sensing hose that maintains a small negative pressure at the switch even with the inducer off, or condensation buildup in the hose that creates a siphon effect.
Common Causes
When to Call a Professional
Contact a licensed HVAC technician if:
- Any time this code appears — a technician must test the pressure switch and its sensing hose to determine the cause
- The pressure switch likely needs replacement; this is not a homeowner repair
- A technician should also inspect the pressure switch hose for kinks, blockages, or water accumulation
✓ Verified against manufacturer service manual — March 2026