Author Topic: No Heat! (Read 4348 times)

ECOW · « **on:** March 16, 2011, 08:01:15 PM »

I don't know what to do! LG Tromm DLE7177RM. It turns and the fan blows but there is no heat. Used the service manual and didn't find the problem. Started to replace parts, after a new heater and main PCB, still nothing. Any help would be appreciated.

krazytech · « **Reply #1 on:** March 16, 2011, 08:43:32 PM »

if you have the service manual did you run the tests?

check the heater
1. Is resistance between Heater terminal
and below 18 ~ 22Ω?
2. Is resistance between Heater terminal
and below 18 ~ 22Ω?
3. Is resistance between Heater terminal
and below 9 ~ 11Ω?

check the thermo
Check if the value of measured resistance is
below 1Ω between terminal TH2 (Safety Thermostat).

ECOW · « **Reply #2 on:** March 20, 2011, 01:59:51 PM »

Yes I did those tests. However the resistence of the heater is a misprint. Its 20 - 20 - 40.

jumptrout51 · « **Reply #3 on:** March 20, 2011, 03:55:15 PM »

Have you verified 220 volts to the machine?
No broken wires?
Motor centrifugal switch closing?

niobrara · « **Reply #4 on:** March 20, 2011, 04:44:27 PM »

If you have checked what and verified the voltage as Jumptrout said,check you the thermistor.Back of the fan housing.

ECOW · « **Reply #5 on:** March 21, 2011, 07:54:07 PM »

Yes I have verified that there is 220 volts.
No broken wires.
Visually the centrifugal switch is closing and when put back together
everything works except for the heat.

The thermistor on the fan housing turns off all operation if broken.

jumptrout51 · « **Reply #6 on:** March 21, 2011, 08:07:27 PM »

You will have to start at the timer and trace the power forward or start at the heater and trace it back to the timer.

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