17 69-0333—6
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 (where applicable).
May be out. Relight pilot flame per furnace manufacturer
instructions.
— RH 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.
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