2.3 Fault Code
DEFINITION
Gas Valve not energized when it should
be 10 times within the same call for heat.
24VAC not sensed on MVL 10 times
Replace IFC
Is continuity(0 ohms)
measured across
PS1?
See Note #1
Note #1
OL = Open Switch
0 ohms = Closed Switch
DEFINITION
An error has occurred with the PS1, indicating that the pressure
switch is closed when it should be open.
In most cases, the pressure switch is not the problem.
NOTE: Verify pressure switch wiring and tube routing
are correct.
3.1 Fault Code
Cycle powser OFF to the
furnace and remove
Orange wire from PS1
NO
Verfiy wiring.
If correct, replace
IFC
Replace pressure
switch and verify
operation
YES
To Next Page