Heater not working after layup
This is not the time of year to have a dodgy heater.
I laid the car up for a few weeks and took the battery out to keep it charged.
When I dug it out of hibernation, the heater won't put out hot air. It blows cold air and it can be directed round the car without issue, the only problem is, it's not hot, or even luke warm.
I checked the hoses to and from the matrix and both are hot, I bled the matrix anyway, to no avail. I then fitted a second hand control box (the one with the 3 knobs) and also the little temperature sensor underneath it. No combination of original or replacements make any difference.
I am now thinking it's something to do with the valve that lets hot water into the matrix, but am open to suggestions. I have taken the passenger footwell "ceiling" off, and found the heater fan, but am not sure where the valve is.
As always, any help gratefully received.
Yours, cold and fed up.