Further Info on ff92s overheat

[wozzer]

wozzer wrote:Can anyone please help : !
I have gone through all the posts i can find, the problem is i have had the usual problems with -22 in freezer and + 23 in fridge you know the usual.
i have replaced both thermistors and the fan still does not run if you open the door for about five seconds it runs for about 10 seconds and then stops, this is driving me up the wall, i have tested the switch on the door thinking it may be that, i some knowledge of electronics and iam a electrician by trade so i have checked all the usual stuff.

Please help i have the unit in bits in the kitchen

wozzer wrote:as per my previous post freezer -22 ok fridge + 20;
both thermisters changed in freezer still not working prop, when i close the fridge door freezer fan comes on for about 5 secs and then stops.
because i have changed the thermisters i presume the only thing it can now be is the PCB .
i know the fan is ok even though its the second fan because if i connect the fan positive to the feed positive on the left hand side connector the fan runs,
any more ideas anyone, getting desperate.

could i poss have a second faulty thermister or could it be the thermal fuse because it runs for 5 secs and then possibly overheats, if i open the door a few seconds later the fans does not run, if i leave it for a few minutes it runs again and then stops.

eastlmark wrote:The thermal fuses tend to protect the heaters rather than the fans so I wouldnt think thats the problem. assuming you have fitted all thermisters correctly then it may well be the pcb at fault. I know we have said it before, unplug before any work is carried out.

ff92s russ wrote:THERE IS A THERMISTOR IN THE FRIDGE THAT CONNECTS TO THE PCB MODULE. THE THERMISTOR IS LOCATED IN THE FRIDGE LIGHT HOUSING AND PLUGS INTO THE PCB WHICH IS FOUND BY REMOVING THE THREE SCREWS IN THE TOP FRONT COVER THAT HOUSES THE LCD DISPLAY THAT ARE HIDDEN WHEN THE FRIDGE DOOR IS SHUT.
THERE IS TWO PART NUMBERS FOR THIS THERMISTOR DEPENDING ON THE DATE CODE OF THE FF92 OR IF IT HAS A STRAIGHT CONNECTOR THAT FITS INTO THE PCB OR A RIGHT ANGLE ONE.
I BELIVE THE STRAIGHT CONNECTOR ONE PART NUMBER IS 2601739 AND THE RIGHT ANGLE CONNECTOR ONE IS PART NUMBER 2600284

HOPE THIS HELPS

wozzer wrote:Ok i have had enough !

I have a FF92S and had driven me to insanity.

Usual temp problems, -22 in freezer + 20 in fridge.

I have changed both thermisters in freezer and also thermister in the top fridge, and a new fan, also new main PCB,

Still not working any more info would be great.

the only thing i find strange is that when i leave the fridge door open for about 1-2 mins and then close the door the fan runs for approx 1 min and then stops, i was thinking what about the thermal fuse ?.

may be i have put the thermisters in the wrong place which i dont think, does anybody have any pics of the locations of the freezer thermisters.

please any help would be great this is the final straw, if i cant fix it this week the fridge freezer is going to be launched through the window.

thanks 🙁

Simon46 wrote:Is the light switch pushing home securely (door drop)

Regards
S.

wozzer wrote:Can anyone please help : !
I have gone through all the posts i can find, the problem is i have had the usual problems with -22 in freezer and + 23 in fridge you know the usual.
i have replaced both thermistors and the fan still does not run if you open the door for about five seconds it runs for about 10 seconds and then stops, this is driving me up the wall, i have tested the switch on the door thinking it may be that, i some knowledge of electronics and iam a electrician by trade so i have checked all the usual stuff.

Please help i have the unit in bits in the kitchen

ok guys this is it :

As per my previous posts that i have changed nearly everthing in my fridge freezer, usual probs -22 freezer + 22 fridge.

i have changed pcd thermistors the lot, i did notice that at the top of the fridge where the circuit board is it is getting very hot, opened it up and the small thermal cut out which i presume controls the fan is very hot.
But the fan runs ok, if i disconnect the fan when the door is closed the fuse cools down, i think i will replace the fan again it could be a dodgey one.

thanks

[jed]

Re: Further Info on ff92s overheat

hi
have you checked the damper motor/solonoid which controls air flow into fridge.it may be stuck in close positon.manually open it/remove cover from back of frg wall for a few hours and see if there is difference in temp.

[wozzer]

Re: Further Info on ff92s overheat

where would i find the damper motor
the thermal fuse cools down when i disconnect the fan, even though it runs for about 60secs then stops this is when the thermal fuse heats up

[wozzer]

Re: Further Info on ff92s overheat

so far i have just changed the fan motor, even though the first one worked but it was causing the thermal component to get very warm in the pcb at the top of the fridge display, this only run for about 60secs, i have now installed a new motor and hey presto, the thermal component is not overheating and fan running longer,
just need to wait to see if fridge cools down, this may have rectified the fault finally after changing nearly all components.

thanks guys

[Penguin45]

Re: Further Info on ff92s overheat

wozzer wrote:Silly question but I presume it make a difference which way the fan rotates to either blow forward or blow back.
The only reason I ask is that I have got the fan working now without it thermally cutting out and still no air comes to the fridge. I possibly need to swap the connections around.

Thanks

AC circuit – the fan can only run in one direction. No airflow would suggest the baffle is not opening.

Pulled the different threads together for you – everybody will get confused otherwise. Try and keep it in one, thanks.

Penguin45.

[Penguin45]

Re: Further Info on ff92s overheat

wozzer wrote:strange fault.
usual stuff fridge +22 freezer-22 fan runs ok, thermisters changed, pcd changed the lot, no cold air coming through duct, theres no blockage and the baffell is open, iam stumped and had enough.

any ideas, please help

Dave_Conway wrote:Which fan though, are both the evaporator and compressor/condensor fans running OK ?

Dave.

Now listen, Wozzer – one problem, one thread. Plaster posts all over the place and not a lot happens, except the Mods get upset trying to pull it all back together. This is your thread; it may or may not solve your problem, but if it’s happening, this is where it’s at. OK?

Penguin45.

[wozzer]

Re: Further Info on ff92s overheat

Penguin45 wrote:

wozzer wrote:
strange fault.
usual stuff fridge +22 freezer-22 fan runs ok, thermisters changed, pcd changed the lot, no cold air coming through duct, theres no blockage and the baffell is open, iam stumped and had enough.

any ideas, please help

Dave_Conway wrote:Which fan though, are both the evaporator and compressor/condensor fans running OK ?

Dave.

Now listen, Wozzer – one problem, one thread. Plaster posts all over the place and not a lot happens, except the Mods get upset trying to pull it all back together. This is your thread; it may or may not solve your problem, but if it’s happening, this is where it’s at. OK?

Penguin45.

Yes Both Fans Are Running OK But No Airflow, I have even removed the baffel and still nothing, any ideas,

ps : sorry about all the threads : pretty new to this site.

[wozzer]

Ok Now All Sorted And Working :

When i bought a new fan motor i had to strip it down and use the old spindle because the fan blade would not fit, so after a day still no joy of working, then o thought lets get the parts that i did not fit and forced the fan blade onto the spindle, then i found out that the spindle was longer but it did not matter so i fitted it all back together and hey presto, within a hour the fridge was getting cooler, after 2 hours its down to +2, great .

thanks for all you nice people out there,

Great forum

[oyster]

Re: Further Info on ff92s overheat

I am really interested in this thread which I found when trying to find my thread #118124 on the same subject. I too have an intermittent freezer fan problem. After checking both thermistors in the freezer were OK I have just fitted a new PCB but I cant believe it but the fan is still intermittent. After closing the door it comes on for about 1 minute then off for a few seconds then on for 30 seconds, then on/off a few more times at random and stops altogether until the door is opened and closed and starts the game again. I have not quite understood wozzers fix – are you saying it was the fan motor faulty and drawing too much current due to some mechanical problem?
However in my case I have found that after disconnecting the fan from the pcb (top white wire on R side) and watching a voltmeter it does the exactly the same on/off switching while drawing no current. It does appear to be some sort of thermal overload but what else could be causing it if not the fan motor. I have not checked the fridge compartment thermistors or the rectangular thermal fuses in the freezer.
The baffle is working fine because I have been running the fridge OK since Christmas with the fan permanently wired on but no defrost.
I too am ready to heave the thing out of the window unless someone help!
I will phone anyone back if you can call me 01481 247480(w) 249946(h)

[gegsy]

Re: Further Info on ff92s overheat

oyster wrote:I am really interested in this thread which I found when trying to find my thread #118124 on the same subject.

You mean this one http://tinyurl.com/3bgx3f

Greg

[Penguin45]

Re: Further Info on ff92s overheat

If I read Wozzers last post correctly, he had not fitted the fan to the shaft correctly, therefore, whilst the new fan motor ran, it didn’t move the fan correctly. Driving it home fully on the shaft appears to have done the trick in this instance.

Penguin45.

[wozzer]

no no the fan did move and was securley fix with a clip on the end, its was all just a mystery, the new fan shaft was longer and the original fan blade would not fit on the new shaft it seamed thicker, so i forced it on being carful not to push it through my hand.
the shaft was also longer and the fan blade stuck further out into the plastic housing,

thanks

[Penguin45]

Re: Further Info on ff92s overheat

Glad you got there, Wozzer.

Penguin45.

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