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38 EX17DT and EX22DT Installation and Operation Manual
Before making a service call, please check the following:
7. Troubleshooting
AT IGNITION:
Heater does not operate. Is the heater plugged in?
Have the fuses or breaker blown at the fuse box / breaker
panel?
Is there a power failure?
Is the air filter blocked?
Is anything blocking the outlet for the hot air?
Is the flue blocked?
Warm air does not flow when the
burner lights.
The fan is started automatically after a short delay. This is
to allow the heat exchanger to warm up, helping to avoid
cold drafts.
Smoke or strange smells are
produced on the first trial light up
after installation.
This is caused by grease or oil and dust on the heat
exchanger and will stop after a short time.
Sharp clicking noises at ignition, or
when unit cuts down on the
thermostat, or goes out.
This is simply expansion noise from the heat exchanger.
DURING COMBUSTION:
Low, rumbling noise when the
thermostat operates.
This is the sound of the solenoid gas valves opening and
closing.
Unit is not heating room. Is the air filter blocked?
Is the set temperature high enough?
Is the warm air outlet blocked by anything?
Are the doors and windows of the room closed?
Was the appliance correctly sized for the space?
Air filter is blocked or the louvers
are blocked or obstructed.
Allow heater to cool, clean air filter or obstruction, operate
again.
Heater will not re-ignite after
overheating.
Even after unit has cooled down, the heater does not
ignite again. Repair is necessary. Contact a qualified/
authorized service provider.
WHEN THE UNIT IS TURNED OFF:
Convection fan continues to run
after turning OFF.
This is to remove the residual heat from the heat
exchanger. The fan will stop when the heater cools down.
Steam is discharged from the flue
terminal.
High efficiency appliances tend to discharge water vapor
on cold days. This is normal.
Unit cuts off without apparent
reason.
Check whether filters are blocked. Dirty filters will cause
the heater to overheat.
OTHER POINTS:
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