very old Engel blowing fuses?

I ruled out the wheel bearings too!

Norm
What have checked or not checked so far, we know what it is but not knowing what investigation you have done/ been able to do, means everything can be possible. For example,
Is there correct polarity at the plug?
Is there damaged, frayed shorted wires inside the cabinet. Does the fuse blow immediately with a “crack” or is it a slow melt.
Does the compressor ever begin to run before the fuse blows.
The circuit breaker button appears to be OUT, is that the normal position?

Well! I presumed you were running it on 12v, my 12v lead for a newer model looks similar and the reason for the polarity question You didn't mention the fuse size being blown. Not being a 12v lead which we have now realized a 0.5amp fuse is a 240 fuse. That circuit should be able to be probed after removing the lead from the fridge and seeing it is blowing the fuse the resistance read by a multimeter will be very low or short circuited. If that is the case then the transformer probably is defunct. The transformer doesn't run the compressor directly, frequency too high. They don't have a motor, just a piston attached to a solenoid driven by alternating DC at about 22v, effectively being ac as it is changed at a low frequency. If it runs on 12v then it is the AC transformer because it supplies rectified AC, ie, DC to the solenoid driver.t

Leigh, thanks for an informative reply, the wiring diagram would be a great help, thanks I will try all of your suggestions...

Norm,

How would you suggest I forward the cct diag. to you.

Leigh.

Take a photo with your phone and post it as a picture in a follow-up here.
Cheers

Leigh, would that same diagram apply to the MRFT-514?

Hi Zippo,

I`m not familiar with the internals of the 514, I suspect the basic wiring may be the same, there will certainly be a transformer, invertor transistors and the swing motor. An eyeball comparison the only way to be sure.


Leigh.