Sorry, Another Fridge Question!

[StitchUp]

Our fridge worked faultlessly on gas while at Newbury Showground for the 4 days - it always works well on gas but not at all on hook-up.

The fridge is a

Here's picture through the side vent - I'm guessing the light blue thing is the igniter which is obviously working fine but, as for the other items in the picture, I've no idea! Is there a relay in this picture - I have a relay checking tool?

Can anyone suggest what I should check or maybe do to give things a chance? I have a test meter but don't know what I should expect to 'see' where!

In short, works on gas, but neither on 12v or mains.

I will of course be mindful that when on hook-up there are risks!

Thanks

 

[StitchUp]

Are all the connections between the display and circuit board ok ?

All appear and feel good I will check again. Of course I can't resolder the board as the board is set in resin!

The 12v line has 12v on it, the 230v lines have 230v on them, so I'm slightly puzzled.

 

[StitchUp]

Are all the connections between the display and circuit board ok ?

They all look fine & plugged in securely.

While sat in the sunshine this morning I had a mini brain wave I remembered the 230v supply was on a trip specifically for the fridge! Excited, I ran out to check it and it had tripped but alas my excitement was short lived as still no life! Anyway it is a step in the right direction

I wonder if there's a way of powering the fidge bypassing the control unit?

 

[GeoffnDee]

You need the control unit as it also controls gas operation of the igniter,solenoid etc. through its 12v power functions. Along with the temp. control operation for the fridge , via the sensor.
Do you have a wiring diagram for your fridge ? , if not , the manual , with wiring diagrams , can be down loaded from www.Manualslib.com (and elsewhere ) and could be useful.

 

[StitchUp]

Indeed I do

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[StitchUp]

Update.
On close examination of the board:

Any comments? No idea what the value is though!

 

[GeoffnDee]

I do not know about your suspect , but It could be worth cleaning up the 2 x glass fuses and their holders , as they both appear to be very corroded which may not be helping with the control board operation (or lack off )

 

[StitchUp]

And the problem was a

After a whole week of faffing around and testing made more difficult by lacquer coated PCB - it was the power switch not operating!!

So now I'm back to where I started but I need to give it a rest for a while

Thanks so much for all the help, so appreciated

 

[StitchUp]

Correction - wasn't the switch at all, it was a break in the track between the switch and terminal, actually 2 breaks. I've since replaced the link wire with much thinner 'hook-up' wire. The board was lacquered which was a PITA for soldering and taking measurements!

So now I'm back to where I started but I'm not overly concerned as our next trip to Malvern show will be on gas anyway

 

[TheBig1]

In those sort of circuits, the usual failure poi ts are parts that mechanically move contacts, such as switches and relays. As there is 240v to the board but then not at the 240v element, I expect the relay sounds like it is energising, but not working. A replacement relay will only be a couple of quid. As you can solder it is an easy job to do

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[StitchUp]

The solder side of the PCB is buried in a resin making component replacement nearly impossible!