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12 69-0636—1
Troubleshooting
Your Honeywell thermostat requires little or no attention. Most problems can generally be
traced to the following:
Problem Check Action
No heat. — system switch. May be in OFF or
COOL position.
Move system switch to HEAT position.
— fuse or circuit breaker. If blown or tripped, replace fuse or reset
breaker.
— furnace power switch. May be Off. Move switch to ON.
— pilot flame. May be out. Relight pilot flame per furnace manufacturers
instructions.
— R and W thermostat connections. Turn Off power to furnace. Check for correct
terminal hookups. Repair any frayed or
broken wires. Firmly tighten all terminal
screws. Turn On power.
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