Troubleshooting – Honeywell MAGIC STAT CT3100 User Manual
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MODE Tap until MANUAL is displayed.
I Up
or
' Down
Close thermostat door, press to adjust tem
perature to desired setting (62° F shown).
MODE When you want to cancel manual override, tap
repeatedly until normal temperature display
shows.
18
TROUBLESHOOTING
Your thermostat requires little or no attention. Before you call for service, please check as
indicated in the following guide.
PROBLEM
CHECK
ACTION
No display.
—system switch. May be in OFF
position.
Move system switch to HEAT or
COOL position.
—fuse or circuit breaker.
If blown or tripped, replace fuse or
reset breaker.
—furnace power switch. May be
OFF.
Move switch to ON.
—thermostat connections.
Turn OFF power to furnace. Check
for correct terminal hookups. Re
pair any frayed or broken wires.
Firmly tighten all terminal screws.
—other.
Contact a qualified service techni
cian for assistance.
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