Hotpoint Aquarius TVFS73 – Poor heat, Thermistor Problem?

[jazzyman]

I have a problem with a Hotpoint Aquarius TVFS73 Tumble Dryer. Sometimes there is no heat being generated and sometimes it is just warm. I have checked the elements and thermostats with a multi meter and all have continuity. There is a Thermistor located near the two thermostats and this is open circuit with no continuity, is this likely to be the problem?

[iadom]

It’s very likely that the thermistor is not open circuit at all. It has a much higher resistance than a basic thermostat so a simple circuit test would show as open circuit. A faulty thermistor should also show an error code.

[jazzyman]

I connected the thermistor to a multi meter for a ohms test which confirmed that thermistor is open circuit, also found that one of the thermostats had tripped since my previous test. If a thermistor is faulty could this cause the thermostat to trip with the result of no heat? I dont think the Aquarius model displays error codes?

[electrofix]

the thermostat will only trip is there is too much heat

when you measured the thermistor did you use a higher range. the range you need to use must be at least 100,000 ohms

Dave

[iadom]

In over 45 years in the trade I don’t think I ever encountered an open circuit thermistor tbh.

[jazzyman]

electrofix wrote:the thermostat will only trip is there is too much heat

when you measured the thermistor did you use a higher range. the range you need to use must be at least 100,000 ohms

Dave

Yes, I tried the 20k, 200k and 2M range all open circuit

[electrofix]

you would need to check as there is more then one model of your dryer with the same model number but different commercial codes

but one I looked up at random uses this thermistor
https://shop.ukwhitegoods.co.uk/c00307622-tumble-dryer-thermistor

Dave

[Author]

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