Haier direct drive motor error F7 - usual motor resistance?

[Mister_D]

Hi all.
I have a 7 year old Haier HW-70B12636 washer. It is erroring F7 and won't spin. Resetting by holding down start before turning on isn't clearing error or allowing it to spin.

I already replaced the PCB successfully about 3 months ago which you could see had blown a resistor and was generating FC1 error. This new PCB still looks fine, so I assume it isn't that. I have used the machine about 12 times since no problems.

With much efffort I have now taken out the motor coils. It is an integrated direct drive motor where coils and magnets are attached to the back of the drum (not belts). I have taken off the coils and tested resistance with a multimeter. I get about 40 ohms on each of the three connections and it isn't shorting to ground on any of the three. ChatGPT tells me the resistance should normally be under 15 ohms for these sorts of motors.

Any opinions on that please? I am unsure whether to risk claiming on the lifetime motor warranty if they come out and charge me because they'll say it's been over-filled or it's not the motor.

Thanks

D

 

[Jurassicspark]

ChatGPT tells me the resistance should normally be under 15 ohms for these sorts of motors.

Don't rely on ChatGPT.

Any opinions on that please? I am unsure whether to risk claiming on the lifetime motor warranty if they come out and charge me because they'll say it's been over-filled or it's not the motor.

Does the motor spin freely? With the machine turned on, with a selected cycle, check the voltage on the UVW terminals.

Check if the hall sensor is aligned properly too.

 

[jj4091]

I am not familiar with this brand of washer but is there any manufacturers name on the motor? One section of this vid

gives the impression that different manufacturers motors have different resistance values. The motor shown seems to be in the high 20's so Chat GP seems to be wrong. Your values may well be correct as I can't think of a fault that would logically cause all 3 sets of coils to increase in value by the same amount, but I may be wrong. Unless it was a bad connection on the common return path connector. Given that you cannot reset the fault it appears you have another problem other than the motor. If you really want to keep the washer it may be worth asking for a service call or at least asking them for an estimated price if it is not the motor. Some companies do fixed price repairs ( parts and labour) Also check if there has been a product recall for your model at any time.