Skip to main content
Error code reference
A.O. Smith Water Heater Error Code 7
Air pressure switch contacts remain closed for more than 5 seconds when they should be open.
SourceA. O. Smith Gas Water Heater - Service Manual: FVIR Modelsp. 21
Diagnostic procedure
The full 7 procedure
Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.
MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
Turn off power to the water heater and ensure pressure switch wiring is correct and not jumped.
SourceA. O. Smith Gas Water Heater - Service Manual: FVIR Modelsp. 21
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
Unlock 7 procedure $9.95
Or subscribe: $29/month for all codes plus Max diagnostics, with 70 Max messages a day. Plus applicable tax.
Where this code is documented
1 manual in the MyPros+ library documents this code for A.O. Smith water heater.
Models covered by the manuals that document this code
75,000+ service documents · 20,000+ error codes · 100+ brands
Get Started$29/month · Cancel anytime · Or $9.95 3-day pass · Plus applicable tax