Troubleshooting - Honeywell CT1802 Owner's Manual

Troubleshooting

Your Honeywell thermostat requires little or no attention. Most problems can generally be
traced to the following:
Problem
No heat.
1 Not applicable on heating-only model.
Check
— system switch. May be in OFF or
COOL position.
1
— fuse or circuit breaker.
— furnace power switch. May be
OFF.
— pilot flame (where applicable).
May be out.
— RH and W thermostat
connections.
Move system switch to HEAT position.
If blown or tripped, replace fuse or reset
breaker.
Move switch to ON.
Relight pilot flame per furnace
manufacturer instructions.
Turn Off power to furnace. Check for
correct terminal hookups. Repair any
frayed or broken wires. Firmly tighten all
terminal screws.
18
Action
(continued)
69-0395—2