Broken fridge freezer

[ReviewingTheSituation]

Our FF has packed up. A quick Google suggests it's the circuit board. We're waiting for someone to come back to us about it, but while I wait - has anyone replaced a circuit board and have any insight as to whether it's an easy/hard/cheap/expensive job?

What exactly is wrong with it? In my experience by the time you've finished replacing parts it's not worth bothering with - parts are expensive. Without diagnostic tools you're usually stabbing in the dark.

It stopped working (as in stopped cooling, and started to defrost itself). An alarm was going off, and when we googled it, the search results suggested that it was either the sensor having too much ice on it or tbe circuit board. A full defrost (so the sensor is definitely clear) didn't work, so we are assuming circuit board.

I'm inclined to get a new one, but if a circuit board is cheap and easy to replace, we might get another couple of years out of it.

I have bought new parts from espares website But never a circuit board.

could be the sensor.
I've arranged for an expert was told was the compressor £400+ cost.
somehow didn't believe him,tried to find on ebay similar sensor, couldn't find the exact one, got one almost identical, swapped the connectors, plugged it, worked cost me £11