Problem
A. Loose, dirty or corroded hi-limit
Pilot remains lit
when gas valve
B. If the above does not correct the
knob is pushed
in, but goes out
when released.
A. Failed thermostat.
Thermostat
does not control
at set point.*
*NOTE: The tolerance band of the Sunne thermostat is +20°F (+6°C) and -20°F (-11°C).
Probable Cause
wires.
problem, the probable causes are a
weak gas valve pilot magnet, pilot
generator low millivolt output, or
a high-limit thermostat stuck open.
Corrective Action
A. Clean/tighten hi-limit wires on gas
valve.
B. Call FAS.
A. Call FAS.
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