CRITICALError Code
E001: Air Supply/Exhaust Blockage (Boiler)Emergency Diagnosis & Repair
Navien boiler detected blockage in air supply or exhaust venting and shut down.
What This Error Code Means
The air pressure switch detected improper venting or combustion air supply.
Common Causes
Blocked vent pipe
Combustion air intake clogged
Vent termination obstructed
Bird or pest nest in vent
Condensate pooling in exhaust
Affected Brands
NavienViessmannWeil-McLainBuderusLochinvar
How ROMA Heating Fixes This Error Code
Inspect entire vent and intake path
Clear all blockages
Check vent slope and drainage
Clean intake screen
Test and confirm no recurrence
Why Choose Our Emergency Service
Priority Response
We prioritise emergency calls and respond fast
Licensed Technicians
TSBC LGA0202903 licensed & WCB insured
Fast Diagnosis
We know error codes and fix them on first visit
Seeing Error Code E001?
Our emergency technicians are ready to fix it right now