HIGHError Code
E205: Pressure Switch Stuck Open (Furnace)
Furnace pressure switch detects inadequate draft and prevents firing for safe exhaust venting.
What This Error Code Means
The draft inducer isn't creating sufficient negative pressure for safe exhaust.
Common Causes
Blocked or frozen vent pipe
Failed draft inducer motor
Cracked pressure switch hose
Defective pressure switch
Restricted combustion air intake
Affected Brands
LennoxCarrierTraneGoodmanRheemYorkBryant
How ROMA Heating Fixes This Error Code
Clear vent and intake pipes
Test draft inducer motor operation
Check switch hoses for cracks
Replace pressure switch if failed
Verify proper switch closure
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