Hotpoint TDC30p motor cuts out when heating

[freddofrog]

Re: Hotpoint TDC30p motor cuts out when heating

Andy jones wrote:Personally I don’t appreciate being labelled a dodgy repair man when some of us are giving up some of our precious home time to try and give advise only to get it thrown back

Andy, the banter between you and Martin in this thread was not conducive to being helpful. If you are “giving up some of our precious home time” then spend that time wisely m8.

Please offer useful advce, or do not post.

It is NOT the relay, there is an issue with the motor causing either arcing or current overload in the timer contacts, that is 100{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d} certain.

[freddofrog]

Re: Hotpoint TDC30p motor cuts out when heating

Martin wrote:5. Check out the thermal trip embedded in the motor windings?

Martin, you’ve mentioned a thermal trip in the motor windings before.

It is NOT the relay, there is NOT a thermal trip in the motor windings, because the 240V supply voltages from the timer go absent from the timer contacts. The voltages would still be visible if a thermal trip had opened.

There is an issue with the motor causing either arcing or current overload in the timer contacts, that is 100{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d} certain.

The capacitor is across the fwd and rev feeds from the timer. When running in either direction, there is 234 volts on one feed, and 270 volts on the other feed. Is this normal ???

[freddofrog]

Re: Hotpoint TDC30p motor cuts out when heating

I’ve created a schematic To clear up any misunderstanding.

Points B and C are for fwd and rev on the motor.

1. With heaters unplugged, the dryer will run ok for a full 2 hours.
chassis to A = 238
chassis to B = 238 then 0 then 270 then 0 etc etc
chassis to C = 270 then 0 then 238 then 0 etc etc
chassis to D = 0.23
live to D = 238

2. With heaters plugged in, the dryer will run ok for about 10 minutes as above.
Then just after the end of a reverse cycle
chassis to A = 238
chassis to B = 0
chassis to C = 0
chassis to D = 0.23
live to D = 238

After about 5 minutes, the volts come back on B and C, then cut again. I open the door (the relay opens), unplug the heaters, close the door, press “on” (the relay latches), then when it starts up it runs ok as in 1 above.

So it is NOT the relay, and it is NOT a thermal trip in the motor.

[Martin]

Re: Hotpoint TDC30p motor cuts out when heating

freddofrog wrote:So it is NOT the relay, and it is NOT a thermal trip in the motor.

Thanks for clearing that up, sorry I couldn’t’ help further. Oh, yes I can, why not……

Option #1. Scrap the thing. 😉

[freddofrog]

Re: Hotpoint TDC30p motor cuts out when heating

Martin wrote:

freddofrog wrote:
So it is NOT the relay, and it is NOT a thermal trip in the motor.

Thanks for clearing that up, sorry I couldn’t’ help further. Oh, yes I can, why not……

Option #1. Scrap the thing. 😉
give up because we don’t know 😉

[iadom]

Re: Hotpoint TDC30p motor cuts out when heating

It appears that the OP with his two decades of experience in the electronics industry knows far more than than three trade members with a combined total of over 120 years experience in the domestic appliance trade. :rolls:

All three of them having actually worked for Hotpoint for many years and all successfully run their own businesses, for well over 35 years in some cases.

There is little doubt that they would have fixed this appliance in short order without any problems whatsoever.

As the OP, even with all his vast knowledge has been unable to repair the machine, he has seen fit to get rude and offensive to members who are among the most helpful on the forums. in view of that I am going to lock this thread, it has run its course.

We bow to the OP’s superior knowledge but will not tolerate disparaging comments calling valued trade members ‘dodgy ‘ etc.

[Author]

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