Hotpoint Oven – No Power

[97browng]

Hi All, I have been directed here from Ultimate Handyman.

A few hours ago I was cleaning my electric oven (Hotpoint Class 7 SI7 891 SP IX) and when I went to wipe the bulb cover the bulb went off and then so did the oven. The bulb was very hot (too hot to hold) and had only been on for a few minutes. Since then I have been unable to get the oven back on. I have ordered a new bulb for tomorrow and will test that but I assumed the oven would work if the bulb was removed (but it is not). I have tried the below, is there anything else I can check myself?

Removed the bulb
Check the house fuse box (nothing tripped)
Checked the fuse on the oven plug (it is just a standard UK 3 pin plug going into a normal single socket). I replaced with a know working 13a fuse.
Checked another wall socket

I have taken the over out and removed the back to take a look and this is what I can see https://drive.google.com/file/d/14nioRtKyguwycKrLdVuCovTquheoU7ou/view?usp=sharing .

Thanks in advance and any help much appreciated.
Gary

[electrofix]

cant see a problem there

did the bulb go pop ?

Dave

[97browng]

It may have made a slight pop but looking at it I can’t actually see a break in the bulb.

Do you think it could just be the bulb and the oven will not work without one? I thought that was unlikely but i will get a spare today to test.

[electrofix]

its not the lamp as you say it will work without

as long as your sure live and neutral is getting to the oven my next thing would be to find and inspect the power board on both sides

Dave

[97browng]

I can confirm that live and neutral is getting to the oven just tested and 230v going in.

I must admit my electric skills are minimum so not sure how I would go about testing the board. I have attached some pictures so if anyone can help then I would really appreciate.

https://drive.google.com/file/d/1v6U…ew?usp=sharing
https://drive.google.com/file/d/1mMi…ew?usp=sharing

PCB Sticker shows PCB 0382 WK: 936 Whirlpool

It also looks like on the top they have an thermal cut out (picture here – https://drive.google.com/file/d/1haY…ew?usp=sharing). When I test with continuity I get a reading of 0, not sure if that is what it is meant to be or not.

Any help appreciated. I have asked if someone can come around but they are not free until late next week and I could really do with the oven.

Thanks Again
Gary

[electrofix]

zero ohms is ok

look at the pic of the board you posted
measure the large green resistor and tell me what that is in ohms

Dave

[97browng]

Thanks for the response. I am getting 46.5 ohms on there.

[electrofix]

well thats ok

try to see of you have live and neutral at the board
that zero ohms (or close to) from the plug to the board

Dave

[97browng]

Hopefully I am doing this correctly.

So the neutral is the yellow lead that goes into the black connector and the white connector on the left. I get continuity here and a reading of 0 on the lead and where it connects to the board. I also get continuity and 0 on a couple of places on the board .

For the live I dont get 0 anywhere on the board. I do get a reading of 200 on the purple wire on the right. The brown live goes into the thermal cut out and I do get continuity and 0 here. However I can see that the small black wire from the live goes into another board hidden under the top and there is also the display led display screen. From there I assume it comes back into this board from somewhere but unfortunately I cant get the top off without taking a load of components off.

I am guessing this suggests there is a problem with one of these boards but without taking it apart more I won’t be able to confirm which one is faulty.

The oven is only 18 month old and Hotpoint have said they will repair for a cost of £120 including all parts and labour. I was hoping I could replace myself for cheaper but by the looks of it the boards are quite expensive and by the time I paid for someone private to confirm which part is faulty it won’t be much difference.

I am thinking I am going to have to suck it up and pay Hotpoint. I must say I am really not impressed with their products. I paid a lot for a matching oven, oven microwave combo and Freezer and they have all had problems.

What are your thoughts? I am assuming that there is not much more we can do without taking the top off and I really don’t want to do that.

Thanks for all the help so far it has been really useful and I have learnt a lot, something I will be applying to some other projects I have.

EDIT – Just to confirm I know that the live coming is in Brown and the Neutral is Blue and Earth Yellow and Green, I am just using the colours above to show what connects from the power block inside the unit.

[electrofix]

from what i can see the door switch stops the live going to the board
have you damaged it when you cleaned the oven ?

Dave

[97browng]

I don’t think so. The door switch looks like it is just a push button at the top if the oven so I definitely would not have been touching when cleaning. It also looks fine and does as expected when I push it.

[electrofix]

looking again there may be a second thermal limiter

you need to find and test that

Dave

[97browng]

Hi All, just to update the Engineer came today and confirmed the issue was on the PCB (had to order a replacement). As per the excellent advice here he confirmed the power was going to board and to the door lock but nothing was coming out of the board. As the part is £100 plus I am not going to be much out of pocket by getting him to confirm.

A big thanks again for your help, really appreciated.

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