Thread: Lancia Thema
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Old 06-23-2008, 08:26 AM
Alfisto Steve Alfisto Steve is offline
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Quote:
Originally Posted by Ryn079 View Post
HI Steve,

it looks like there are 3 problems with my Lancia Thema A/C.

1. There is a gap between the blower motor and the A/C evaporator in the firewall, should this be there?

2. All the servos work as i can hear them, all but the servo operated by the recirculation button, where is this servo situated please (i.e. the one that is actuated by the recirculation button)

3. The A/C compressor is cycling on and off, what and where does the compressor receive the signal to operate on or off? The fan radiator also cycles on and off with the compressor. I read somewhere that there is an extra thermostatic switch in the radiator which could be causing this. Could it be?

Thanks a lot for your help.


Ryan
1. The rubber ring with foam insert must be missing. I wrap that space with wide black tar tape designed to seal off expansion tube capiliary from the heat when foam gone. In your case if both gone still wrap opening with some wide duct tape if you don't have tar tape.

2. Recirulation door motor (item 13 in my second pix above) is hidden under black plastic cover on corner of evaporator box under R/H corner of windshield. I guess you are saying door in evaporator box is staying open when button pushed on? I just had to change a bad door motor on my son's 164. You can have a bad switch in a/c panel too or wiring issue.

3. Thermal switch in radiator also controls low speed of cooling fan but trinary switch on end of a/c receiver dryer on top of evaporator box also turns fan on and off as freon pressure rises and falls. Trinary switch and frost switch can turn compressor clutch off if low or high pressure sensed in system or if evaporator starts to freeze.
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Last edited by Alfisto Steve; 06-23-2008 at 08:29 AM.
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