Air con switches

[Bruiser]

I have just bought a 300CE Sportline. I can't believe I didn't check before I bought it that I didn't check but you know how you miss things even if they're obvious! The dehumidifier, EC and re-circulation switches do not light up - does this mean that the whole aircon system doesn't work or might it just be the switch gear? Its a 92J - am I right in thinking that AC never works on cars that old or should I try sorting it?

 

[Richard Moakes]

Even if it's out of gas, the lights should come on, and the recirculation switch should operate.

You are probably chasing an electrical fault, time to check every fuse I think.

Don't know where the factory aircon controls are, but the Diavia aftermarket system has a small black ECU under the carpet and sound deadening on the passenger front footwell.

Richard

 

[Bruiser]

Thanks

where exactly is the ECU and is it possible to test it? Appears to be the after market unit fitted in 97 according to the paperwork I got with the car.

 

[Richard Moakes]

lift the carpet in the passenger footwell, and then look underneath the sound deadening foam etc... you will see a small black box with various wires coming to and from it.

I would suggest unplugging it and plugging it back in again, just in case the contacts need a clean, however the most likely cause of the problem is a fuse somewhere in the engine compartment.

Richard