i apologize if this seems a dumb question. But, I’m refurbishment my heater and just wanted to check that the top leaver that moves Hot-Warm-Cold is the leaver that operates the flap that closes the heater matrix off and on. i.e it closes up against the matrix in the cold position.
Have you stuck with the original matrix or switched to a more modern one? The last one I did I added a modern (Fiesta I think it was) water matrix, but also the Fiesta electric one. Have not wired it all up yet haha. It’s also my intention to use an electronic valve to control water flow to the heater. A simple on/off arrangement.
I have a bit of a thing about effective heaters in cars.