WD420 Hotpoint no spin (not the brushes) thermal cut out on motor?

[scotty]

Hi folks thanks for helpin me on this, i need to test a Motor for the above washing machine, as i am not sure why its not spinning and need to figure out if its the motor or the controler thats faulty.

but its not that simple, the brushes are ok and there is 7 wires that go into the motor, and am not really sure what they are for, i beleive the two red ones are for some kind of speedo pick-up, and both the blue and black go to the brushes (which are fine)

but there are a brown, yellow and green that i have no clue what they are for,

am i lead to beleive these motors have a thermal cut out?

there is a possibility this machine has over heated as i had to remove a rather dented coin from the drum, so it could have jammed up.

everything on the machine is fine and i dont have any fault codes on it, it just wont spin

any ideas???

thanks

[Harry Bloomfield]

It happens that scotty formulated :

Are suggesting that the ONLY problem is that it will not spin?

Does the motor run OK for the wash cycle, but then not spin?

Just a possibility to for you to try....

It is inhibited from the spin, it if cannot prove the water has been all pumped out. It checks for this via a pressure switch - the switch is located just to the rear of the powder drawer and there is a narrow pipe running from it, down to the bottom of the drum. Check by blowing down the pipe, that it is clear and check the switch clicks over by blowing very gently into where the pipe fits. Also check that all of the water is being pumped out.

[Andrew Gabriel]

There will be a pair of connections for the field windings (separate from the armature so that the motor can be reversed). On some Hotpoint motors (those fitted to the fast spin models), there's an additional field winding connection which is only used for the top spin speed.

green/yellow stripe is earth.

What is the top rated spin speed of that machine? Will it do any of the parts of the spin cycle? What actually happens?

Don't try and run the motor with no load (drum) attached. These motors are capable of running at speeds which make them fly into bits when they have no load (and I wouldn't rely on the software reading the tacho to protect you from that).

[F]

Have you checked for continuity on all seven wires? I had a machine that stopped for 'no reason' and eventually found that one of the wires was broken where it went into the multiplug on the motor.

Don't forget to disconnect from the mains before you do anything!

[Matty F]

With older machines that was often because of a buildup of soap in the machine, in which case do a wash with very hot water. Otherwise there may be a microswitch that detects an out-of-balance load, and that could be faulty or a wire detached or the spring that holds the bowl away from the microswitch may have fallen off or broken.