Rheem R802VA07542117MSA Error Code T057_F: Inducer Hi Pressure Switch Won't Close

What Does Code T057_F Mean?

Fault code T057_F on the Rheem R802VA indicates that the high-stage inducer pressure switch failed to close during high-stage operation. This is a two-stage only fault — it occurs when the furnace steps up to high-fire and the inducer cannot build enough draft to satisfy the high-stage pressure switch.

Two-stage furnaces have separate pressure switches (or a dual-level switch) for low-stage and high-stage operation. High-stage requires more draft because more gas is being burned. If the exhaust path has a partial restriction, the inducer may generate enough vacuum for low-stage operation but not enough for the higher airflow demand of high-stage.

A partial blockage in the exhaust vent is the most common homeowner-addressable cause. The restriction may not affect low-stage operation noticeably but becomes a problem when the furnace demands higher draft. A failing inducer motor that can no longer reach full speed or a defective high-stage pressure switch are other possible causes.

Common Causes

How to Fix It: Check the Exhaust Vent for Partial Blockages

What You'll Need

• Flashlight
• Work gloves

Steps

1. Turn off power at the breaker or power switch AND shut off the gas supply valve Locate the furnace circuit breaker and flip it to OFF. Turn the gas shutoff valve to the OFF position (perpendicular to the pipe). If you smell gas, leave immediately and call your gas company.
2. Inspect the exhaust vent outside your home Go outside and locate the furnace exhaust vent pipe. Look inside as far as you can with a flashlight. Even a partial blockage from ice, debris, or a partial nest can cause this code. Clear any obstructions you can safely reach.
3. Check the full length of visible vent pipe If accessible, inspect the exhaust vent pipe where it runs through your home. Look for any sags, kinks, disconnected joints, or areas where condensation may have collected. A partial restriction anywhere in the run can affect high-stage draft.
4. Check the combustion air intake pipe If your furnace has a separate intake pipe, inspect it for blockages as well. A restricted intake compounds the draft problem during high-stage operation.
5. Restore power and gas, then test Turn the gas supply valve to ON and flip the circuit breaker to ON. Set your thermostat several degrees above room temperature to trigger high-stage operation and monitor whether the furnace runs through a full high-fire cycle.

When to Call a Professional

Contact a licensed HVAC technician if:

• The exhaust vent appears clear but the T057_F fault recurs on high-stage calls
• The furnace works fine on low-stage but always faults on high-stage
• The inducer motor sounds different at high speed compared to low speed
• You notice water or condensation in the pressure switch hoses
• The exhaust vent run is very long or has multiple elbows

✓ Verified against manufacturer service manual — March 2026