Honeywell T8090T Owner's Manual - Page 15

Troubleshooting

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Troubleshooting Your Honeywell Trol-A-Temp® Thermostat requires little or no attention. Most problems can be traced to the following. PROBLEM CHECK ACTION No heat. -system switch. May be in OFF or Move system switch to HEAT COOL position. 1 position. -fuse or circuit breaker. If blown or tripped, replace fuse or reset breaker. -furnace power switch. May be Off. Move switch to ON. -heating equipment for proper operation. -thermostat connections. See manufacturer's instructions. Turn Off power. Check for correct terminal hookups. Repair any frayed or broken wires. Firmly tighten all terminal screws. -airflow at register. Zone damper may be closed. 15 If damper is closed, contact a qualified service technician for assistance. (continued) 69-0432-1

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15
69-0432—1
Troubleshooting
Your Honeywell Trol-A-Temp
®
Thermostat requires little or no attention. Most problems can be
traced to the following.
(continued)
PROBLEM
CHECK
ACTION
No heat.
—system switch. May be in OFF or
COOL position.
1
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.
—heating equipment for proper
operation.
See manufacturer’s instructions.
—thermostat connections.
Turn Off power. Check for correct
terminal hookups. Repair any frayed
or broken wires. Firmly tighten all
terminal screws.
—airflow at register. Zone damper
may be closed.
If damper is closed, contact a
qualified service technician for
assistance.