Dealer Maintenance; Troubleshooting - Thermo Pride GMC-85 Installation And Service Manual

All installations and services must be performed by qualified service personnel.
THIS SECTION IS ONLY TO BE PERFORMED BY TRAINED, QUALIFIED SERVICE
PERSONNEL, AND NOT BY THE FURNACE OWNER.
A. TROUBLESHOOTING
When testing electrical equipment, always follow standard electrical procedures
:
and precautions.
1. Check for line voltage (110-120VAC) to the furnace. If there is no line voltage applied to
the furnace, check that disconnecting switch is "on", fuses or circuit breakers have not
blown or tripped.
2. Make sure thermostat is "calling for heat".
3. Check for adequate fuel supply and pressure. Are all the fuel shutoff valves are open?
V. DEALER MAINTENANCE
31