[Hamgray]

Re: Hotpoint Freezer Drawer

Hi kwatt,
Thanks for your reply.
Yes, I have tried the 160 in the top position and there’s still a gap underneath, albeit slightly smaller.
I rang Hotpoint to ask, but they couldn’t comment! Only mention was ‘airflow’ (it’s a frost-free freezer with blown air).
For some mad reason, the 160 is cheaper than the 145 size! Plus I get more storage.
Or, as another posted on a review – “a lot of money for a piece of plastic”!

[Hamgray]

Re: No dryer heat on Hotpoint WD640

Hi again!
If you are there iodom, I have another strange symptom yesterday, hopefully you can explain?
I did a ‘high heat’ dry cycle and after about 30-60 mins (can’t be sure exactly) I heard the machine was doing a fast spin cycle! Everything seemed hot inside, so assuming the dry section was still working, but why the spin? Any ideas?
Many thanks

[Hamgray]

Re: No dryer heat on Hotpoint WD640

Good news! Did a dry cycle today and it performed well. I could see (from my electricity monitor) that the dryer heater was switching on and off, so that confirms the circuit and thermistor is working ok. The gauze filter can be removed next time it fails! At least I know where to look now. Many thanks.
Hopefully others who find this forum with ongoing saga can learn from it too.

[Hamgray]

Re: No dryer heat on Hotpoint WD640

Yuk! It was a bit clogged inside the filter, some aluminium rust to wire brush away too. Half the filter was clear, but probably enough to restrict air flow. I also poured a little hot water down the filter housing in case some sludge was lurking beneath.
Refrained from cutting the gauze as you suggested, felt sorry for the fan which could get clogged up with gunge. Always an option for next time.
Until I have a full wash of wet clothes to check it with, can’t be sure there’s another problem with the thermistor circuit. However the dryer ducting is much cooler now, with the end connected to the drum hotter than above the element. That’s a result.
Certainly appears to work better, and I can’t thank iadom enough for his great help.
Attached for information photo of my thermal cut-out switch. Maybe others are the same but it does require breaking the seal to get the paperclip in.
Just for information my machine appears to be a WD640P. Not sure if the ‘P’ is any different?
Cheers

[Hamgray]

Re: No dryer heat on Hotpoint WD640

So far I have only removed the top cover of the dryer metal chamber. I guess to see the filter, the whole box has to be removed – ie. including the metal base of the dryer? Have to pluck up courage to do that – looked a bigger job!

I bought the machine new in November 2004, but it’s not been over used. Maximum 3 washes a week (sometimes only 1or 2) and usually using the quick ‘E’ wash (1 hour). The dryer part has probably only been used less than 10 times in it’s 10 year life.

It has never been repaired and (so far) given good service.
The overheat cut-out definitely is the resettable type by pushing an open paper clip between the connector tags from the top of the switch. I read on another forum that some do have this, so tried it!

I’m really grateful for your advice, I’m itching to get it working again. I may have to buy a new thermistor anyway, as I have now broken the plastic clip which holds the small connector to it. So far the solvent glue is holding for testing purposes!

[Hamgray]

Re: No dryer heat on Hotpoint WD640

Thanks for the update.
Had another go at the machine today by wiring in a variable resistor in place of the thermistor and changed the resistance hoping to get the power to the element to switch off. It didn’t, but I did get the F13 error again. Seems that a short or open from the thermistor gives that error. Tested the thermistor in hot(ish) water and the value went down to 4k, so appears to change resistance.
Is testing the dryer empty going to cause any strange symptom?
Wondering if, without wet clothes is not a good idea?
I’ll have a look at the box you mention, guess it’s the condenser.
Although can’t quite see which part I need to look at.
Thanks a lot for you advice.

[Hamgray]

Re: No dryer heat on Hotpoint WD640

Can anyone please tell me what the resistance of the sensor should be when it signals to the PCB to turn off the heater?

[Hamgray]

Re: No dryer heat on Hotpoint WD640

Hope it’s ok to add to this older post.
I too have the F13 error on my WD640.
The thermostat trips out when the dryer metal box overheats.
The cut-out is of the style that can be reset with a paperclip.
Would I be right to think that my Thermistor (temperature sensor) is not working? I guess it’s the item with two thin black wires connected to it? Seem to recall it was open circuit when i checked but see here It should be 26K. If o/c would that mean the control panel powers the dryer until the thermal cut-out trips?
Guess I could test it with a variable resistor wired in to see if the heater stops with a low resistance feed?
If so, any ideas where I can obtain a replacement in the UK.
Have already removed the metal lid, cleaned all inside (no fluff as hardly been used). Motor spins ok with no rubbing marks from (plastic) fan.
Many thanks for your help.

[Author]

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