User Manual

Red LED Constant On
Normal Operation
Problem
Red LED not on during a call for heat.
Is heater
plugged in?
Does heater
start?
Yes
No
Yes
Yes
Yes
Is
thermostat
set above room
temperature?
Set thermostat
above room
temperature.
Is
thermostat
defective? Check
for voltage supply
into and out of
thermostat.
Is
proper
voltage supplied
to heater power cord
and through power
cord?
Check dataplate for
electrical supply
requirements. Provide
proper voltage from
electrical supply. Check
circuit breakers in
building electrical
system. Check power
cord for continuity.
Replace thermostat
Are
24 volts
supplied from
transformer?
Replace
transformer
No
No
No
No
Yes
Are
24 volts
supplied to ignition
control terminal W
during ignition
sequence
Poor electrical connection or broken wire present. Repair or replace.
Voltage drop from thermostat to terminal W on ignition control.
Incorrect wire size from thermostat to terminal W on ignition control.
Yes
Replace ignition control.
Is
proper
voltage supplied
to transformer?
Check electrical connections and power
supply to transformer.
Repair as necessary.
No
Yes
24
Plug heater in.
No
Yes
Replace red LED
No