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How to test a tumble dryer that is not heating and change a thermostat that is faulty

by / Monday, 19 August 2013 / Published in Heating Systems, Repair Guides, Tumble Dryers

This video is on a compact Zanussi but the testing and repair is very similar on most makes.

Your tumble dryer is not heating? Could Be One Of The Following:
If you have a Tumble Dryer that is not heating up but the drum is turning ok, then the chances are the thermal overload cut-out has tripped or the heater might have blown. Some older dryers have a red reset button on the back of the casing, just press the reset until you feel it click and you should have heat again white knight, creda and some other makes have this. Neff, Bosch dryers have a reset button but you will have to remove the heater cover panel to access it, you will find it just above the heating element (a black stat with small red button) simply press the red button and if it clicks you've fixed it or you can test it as in the video.

tumble-dryer-reset-button

TUMBLE DRYER RESET BUTTON

 

dryers-have-a-red-reset-button

DRYERS HAVE A RED RESET BUTTON

 

tumble-dryer-inlet-cut-out-thermostat

TUMBLE DRYER INLET CUT OUT THERMOSTAT

 

Why do Tumble Dryer Thermostats Fail?

In most cases it´s a fault generated by use or failure to use and maintain the tumble dryer correctly. A little care could prevent the hassle and cost on these repairs:

1 - The Tumble Dryer Filters must be cleaned!

If the air doesn't flow, the machine can overheat and the safety will trip. Any obstruction to the rate of airflow will affect the operation of the dryer and almost certainly cause a failure of the thermostat or, the safety thermostat to trip. If you don't clean the fluff or lint filters, don't fit them back properly or use the tumble dryer with damaged or broken filters it will affect the efficiency of your tumble dryer and as the temperature is no not kept down by cooler air being drawn into the tumble dryer. This increase in temperature can and does, rise high enough to trip out safety thermostats. Any obstruction to the rate of airflow will affect the operation of the dryer and almost certainly cause a failure of the thermostat or, the safety thermostat to trip.

2 - Tumble Dryer Vent Hose!

A blocked vent hose, with fluff or bended in the back of the machine stops the air flow from the machine, tripping the thermostats.

3 - Overloading your Tumble Dryer!

Putting too much clothes in your tumble dyer will affect the airflow, and almost certainly cause a failure of the thermostat or, the safety thermostat to trip.

4 – Always keep Tumble Dryer Condenser Unit Clean!

The aluminum plates at the bottom of condenser tumble dryers, to prevent any blockages caused by the fluff build-up.

5 - Opening The Door During The Drying Cycle!

The dryer has been switched off before the end of the drying cycle and not allowed the dryer to cool down correctly. ALWAYS LET THE DRYER GO THROUGH THE COOLING CYCLE.




107 Responses to “How to test a tumble dryer that is not heating and change a thermostat that is faulty”

  1. chris says : Reply

    i have a creda condenser tumble dryer t622cw model only the low heat on it was working so ive fitted a new heater element and now it keeps tripping the thermostat and it is cold air what can i do please

  2. George says : Reply

    I have changed the drum belt on my Hotpoint V3DS01 and now it doesn’t heat up. Before the belt was changed the machine did warm up. the thermostat was changed about 5 months ago. any ideas please?

  3. aimee birchnall says : Reply

    Hi I have a Creda Reversair model 37382. It has stopped heating up but the drum is still working fine. Is there a reset button for this model? Thanks

  4. Glyn says : Reply

    I have a beko dryer which is not heating. I have replaced the heater element but it is still not heating

  5. Anne says : Reply

    Hi my Hoover nexus hydro dryer won’t heat up is there a reset switch ?

  6. Krista campbell says : Reply

    Hi I have a beko dc6130 w condenser tumble dryer it’s only 6 months old and all of a sudden no heat everything else is fine. We took the back of found reset button and when we pressed it , it wouldn’t budge like it wasn’t a button at all ? Any help would be appreciated . Thank you

  7. Stanton Henby says : Reply

    Running costs are one of the most important things. During our tests we use an electricity meter to measure how much power the tumble dryer consumed. This lets us work out our own cost-per-cycle, letting us compare the difference in each drying mode.

  8. Jane says : Reply

    My candy grand condensor dryer has stopped heating up does it have a cut off switch and where can the heating elements be found cleaned all filters emptied water tank

  9. pete says : Reply

    i have a beko dcu 8230 , it stopped heating up . tried the reset on back nothing , so i purchased a new heater , fitted it and still the same ? any ideas please , i realised i have been opening the door before finished ( drum turns , light inside is on ) thanks

  10. Clare says : Reply

    Hi

    I have a bush washer dryer that is not heating up during the drying process how can we fix this?

    Thanks

  11. Michael pugh says : Reply

    Hi,
    I have a creda tumble drier which is old but upto now has worked well,but at the moment it does not get very warm and takes ages to dry clothes. Model Number 37740

  12. Michael pugh says : Reply

    As per above please.

  13. nicky says : Reply

    Hi i have a crusader ct61c it had new thermostat a month ago but now stopped heating. I can’t find reset button what could problem be plz

  14. Jane says : Reply

    My candy grand condensor dryer has stopped heating upbitcstill spins does it have a e set button

  15. Gareth says : Reply

    Why is it taking so long (26 days???) to moderate a perfectly normal question?
    I really need to know if this dryer is fixable or not or if I have to spend $1000 on a new one (yes the cheapest condenser model I can find in New Zealand is a fiver short of a grand or 500 quid UK).

  16. Tracey says : Reply

    I have a hoover VT580 which started blowing cold air. I replaced the heater element unit, and that didn’t work. I’ve just replace the ntc probe, and it is still blowing cold with both remold & the new heating element. Am I missing somethingk

  17. Tracey says : Reply

    That was supposed to read “still blowing cold with both the old and the new heating element. Am I missing something?”

  18. Kevin says : Reply

    How can I tell if the thermostat is not working or if it is the heater element

  19. mark taylor says : Reply

    Hi Paul, I have a bosch WTA4408 tumble dryer.
    It was failing to turn sometimes and the safety thermostat tripping due to this. Bought a capacitor off you guys and all good, setting away fine now even with heavier loads. I did suspect there was a second underlining fault as the heater seams to cycle in and out, more off than on. When on, the heater is at full temp (element has been replaced in the past). The red button on the safety thermostat hasn’t tripped. What do you recon mate? Has the earlier overheating due to the faulty capacitor cooked the safety thermostat or one of the remaining other two thermostats? If one of the thermostats were blown and producing an open circuit then surely the heater would never come on would it? Any guidance would be greatly appreciated Paul….best regards, Mark.

  20. Vanessa says : Reply

    Hi, hope you can help me I have a Hoover condenser dryer model VTC791NB, the dryer will not heat up the filter condenser unit was covered in fluff, I have cleaned it out with an air hose and water is empty have I tripped it and if so is there a reset button, the drum goes round but the heater isn’t heating?
    Many thanks Vanessa

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