- This topic has 12 replies, 3 voices, and was last updated 1 year, 10 months ago by
.
-
Posts
-
Hey all,
I’ve got an old hoover washing machine that’s been kept in the garden for some time (I use it for really dirty clothes and the dogs beds).
It stopped working over the winter (possibly got wet) and I’d like to try and get it going again…
When you run a cycle on the machine it returns an E08 code. I believe this means a motor or motor speed sensor problem.
The motor is working as the drum starts spinning effortlessly, before quickly shutting off (it does this a few times before returning the error).
This led me to look at the speed sensor… I pulled the motor out and stuck an ohm meter across the pins which returned 41 ohms. When I spun the motor I saw this value jump about. I believe this is the expected behaviour… While I was there I checked the brushes and they seemed fine too…
Given I saw no problems here I looked at the motherboard and connectors and everything looked fine here too (I gave them a good blast off electrical contact cleaner).
Anyway, after putting everything back together I got the same error. So…. Does anyone have any ideas of what the problem could be or how I could diagnose it further (without changing the motor or PCB)?
Cheers Dan
kaibart wrote:Maybe worth checking the heating element for low insulation but e08 is normally a motor fault
can be heater
machine does not sense heater when not connected so as a check remove both heater terminals and insulate
then try itif no E08 change heater
DaveOh wow. Thanks guys. I didn’t know the heater could cause an E08.
I replaced it a couple of years ago but it’s a hard water area so I’ll give this a go.
From memory I think the heater has at least 5 wires on it. 2 for power, 2 for a heat sensor and one for an earth… I’ll double check this though.
Should I remove everything or just the power cables? If I was gonna take measurements across the pins where would I take them and what readings should I expect?
Cheers
Dan
Unfortunately the same issue after unplugging the heater. I think it’s chalked but 9 years with it with the last 2 in the garden… It’s done alright lol
Hey Dave,
Yea, at the beginning of a program the drum starts to fill with water then spins for about 1 or 2 seconds before shutting off. Then it waits about 1 minute and tries again. This happens at least 4 times before the machine gives an E08 error.
Cheers
Dan
ok
whats happening is the motor is starting but the feedback from the motor is not reaching the board to tell the board how fast its going
on the back of the motor is a small circular magnet in a coil. This magnet revolves and generates a voltage in the coil proportionate to the motor speed
first you have to find the wires that connect to this coil on the motor and see if you can get a resistance reading from it. Also check the magnet is not damaged and revolves with the armature
if all ok you then need to check the wiring up to the board
on some motors it could be as simple as the magnet has become unscrewed and is not revolving
Dave
Hi Dave,
Thanks for that!
I did already find the motor speed sensor and wiring. I cleaned all the connectors and gave the wiring a quick inspection (no obvious damage).
I measured across the outputs of the speed sensor and got 41 ohms. When I spun the motor by hand this jumped about but no idea if the values are correct or valid.
I guess I could try and take that same measurement at the board end and if I’m still getting 41 ohms the board is fired right?
well yes and no
if you get the reading on the board you could then check the triac on the board
look for the heatsink and you will see a 3 legged component soldered into the board. use the multimeter and check between the centre leg and either of the outer one. you should get no reading unless the component is faulty
if that component fails the motor accellerates like mad and then slows down as the board switches it off
would not expect E08 on that fault but it cant hurt to checkDave
- You must be logged in to reply to this topic.