Rheem R802VA07542117MSA Error Code T047_F: Inducer Fan 5 Minute Lockout

What Does Code T047_F Mean?

Fault code T047_F on the Rheem R802VA is a troubleshooting-level fault indicating the inducer fan has triggered a 5-minute soft lockout. The pressure switch failed to close within the required time during the pre-purge cycle.

This is a lower-severity version of pressure switch issues. The "T" prefix means it is a troubleshooting event, not yet an alarm. A single occurrence of T047_F can happen due to temporary conditions — a gust of wind blowing into the exhaust vent, a brief accumulation of snow, or the inducer motor being slow to start on a cold day.

If T047_F occurs repeatedly, it indicates a more persistent problem: a partial vent blockage, an aging inducer motor losing performance, or a pressure switch hose developing a slow leak or partial obstruction. The furnace will automatically retry after the 5-minute lockout expires.

Common Causes

How to Fix It: Check the Exhaust Vent for 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. Check for any blockages: ice, snow, animal nests, leaves, or debris. Clear any obstructions you can safely reach.
3. Check the combustion air intake pipe If your furnace has a separate combustion air intake, inspect it for blockages too. Both the exhaust and intake must be clear for proper draft.
4. Restore power and gas, then monitor Turn the gas supply valve to ON and flip the circuit breaker to ON. The 5-minute lockout will expire on its own. Set your thermostat to call for heat and monitor whether the furnace starts normally.

When to Call a Professional

Contact a licensed HVAC technician if:

• The T047_F fault occurs repeatedly over multiple days
• The inducer motor sounds louder than usual or makes grinding noises
• The vent pipes are clear but the fault keeps coming back
• The fault escalates to A047_F (alarm-level lockout)
• The furnace takes multiple attempts to start each time

✓ Verified against manufacturer service manual — March 2026