No, we're not putting our feet up and having a rest!

Darren came over last night to help out with the radiator/fan issue. We quickly removed the temp-sender from the original radiator and then Darren suggested we test it to ensure it still worked.

With only the ignition on, the wiring harness was plugged into the spare temp-sender which rested in an old mug. The kettle was boiled and the water poured into the mug. After a short while the fan started running. Thus it was proven the spare temp-sender worked.

It occurred to us that during our experimentation the water had to be boiling hot. If not then the fan would not kick in. Thus we chose to risk getting the car hot enough to check the operation of the temp-sender in the radiator. After a long while and pipes getting very hot, it worked!

Now we don't have to worry about swapping the temp-sender and we know the cooling system works properly with no leaks. Seems like Karen and Richard did a good job at the weekend after all.