Firstly, I'm not a thread miner normally but this thread has plently of useful info in it and it applies to my problem so here goes.

When I converted my ED Fairmont with an EF Fairmont interior, my climate control doesn't function properly. The problem is very similar to what arm79 says about the incompatibility between the EF and EL climate control modules and solonoid vacuum blocks.

Whenever I select a face vent, the air only comes out of the floor and screen. Whenever anything else is selected, the air comes out of the face and/or floor.

I am certain that both components came out of the same car but I'm not 100%. Also, I'm using the blue vacuum solonoid block with the 94DA EF sticker on it. It could be out of a series 2 Ghia as the car had gold 4.0 stickers on the doors.

How do I use a relay to reverse the signals going from the climate control unit to the solonoid block as discussed here?

Does this mean that I only need to convert the output on the face level signal wire from the climate control? If this is the case, which face level wire as I believe there is a cold(red + dark blue wires) one and a hot(blue wire) one?

I'm 100% certain that all hoses are where they are supposed to be on the vacuum solonoid.

Perhaps, I should bite the bullet and remove my dash and swap the solonoid over. Where's the challenge in that

For the record, I borrowed a black solonoid from another EF and plugged it in. I can confirm that my vacuum hoses are 100% correct in what they are connected to as the climate control functioned perfectly. It seems that the 94DA blue EF2 solonoid is an EL solonoid in disguise. I'm one of the very few punters who have been caught out!

some of the ef2 stuff might have been el hybrids?