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Problem Probable Cause Corrective Action
A. Loose, dirty or corroded hi-limit
wires.
A. Clean/tighten hi-limit wires on gas
valve.
Pilot remains lit
when gas valve
knob is pushed
in, but goes out
when released.
B. If the above does not correct the
problem, the probable causes are a
weak gas valve pilot magnet, pilot
generator low millivolt output, or
a high-limit thermostat stuck open.
B. Call FASC.
A. Thermostat out of calibration. A. Check calibration of thermostat in
accordance with procedures in
Section 4.2 of this manual.
Thermostat
does not control
at set point.
B. Failed thermostat. B. Call FASC.