Lancia Thema

[Ryn079]

Hi guys,

you are my last resort as it looks like there is no Lancia Forum on the web. I have a 1991 Lancia thema which shares the floorplan and most of its components with the 164. My problem is with the A/C. The A/C has climate control. The compressor is working intermittently, and i am noticing this as you can hear the radiator fan going on and off with the compressor. I went to an A/C mechanic and still the car is not lowering the temperature enough to drive with closed windows in Malta. Any advice....the A/C mechanic hinted to bypass some temperature sensor. I read somewhere on this forum that the problem could be heat being passed to the dash core, how can i check this?

Your help would be greatly appreciated.

Thanks in advance.


Ryan

[Alfisto Steve]

Quote:

Originally Posted by Ryn079 Hi guys, you are my last resort as it looks like there is no Lancia Forum on the web. I have a 1991 Lancia thema which shares the floorplan and most of its components with the 164. My problem is with the A/C. The A/C has climate control. The compressor is working intermittently, and i am noticing this as you can hear the radiator fan going on and off with the compressor. I went to an A/C mechanic and still the car is not lowering the temperature enough to drive with closed windows in Malta. Any advice....the A/C mechanic hinted to bypass some temperature sensor. I read somewhere on this forum that the problem could be heat being passed to the dash core, how can i check this? Your help would be greatly appreciated. Thanks in advance. Ryan

[Ryn079]

mine is a 1991 2.0 16v. I am sorry I did not mention it before. Thanks a lot for replying alfisto Steve .

[Alfisto Steve]

Quote:

Originally Posted by Ryn079 mine is a 1991 2.0 16v. I am sorry I did not mention it before. Thanks a lot for replying alfisto Steve .

[flaminia first]

Ryn079, you had no response at Viva Lancia? They have an English language forum with bulletin boards for every model, including the Thema.

[Ryn079]

thanks to everyone. Will try the viva lancia forum.

[DPDISXR4Ti]

Quote:

Originally Posted by Ryn079 mine is a 1991 2.0 16v.

[ncundy]

As already suggested try viva-lancia

but also try

The Lancisti Forums

and the UK Thema Consortium

Lancia Thema Dedra Consortium

I used to have a 1994 Thema Turbo - very under-rated cars IMO.

[Alfisto Steve]

Quote:

Originally Posted by DPDISXR4Ti Given that, I wonder if perhaps your setup might be closer to the one found on the Saab 9000? Pure speculation on my part - just something else to consider. Regardless, you really need to do some diagnosis and determine what the actual cause of the problem is. Based on what you've indicated, it doesn't sound like a "heat leakage" issue to me. Something is commanding the compressor to cycle off.

[Ryn079]

Hey Guys,

thanks for all your help, really appreciated. Unfortunately, by the looks of it, the Viva LAncia forum is no match to your forum. I will try to post some pics later on maybe you can help me out.

Ryan

[Ryn079]

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

[Alfisto Steve]

Quote:

Originally Posted by Ryn079 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

[Ryn079]

Steve you are simply the best! Thanks for answering my questions. One last thing....were you the creator of the 164? It looks like you know everything about this car.

Nothing more to be said than a very big thank you!


Ryan

[Ryn079]

Hi Guys,

i am attaching some photos of my Thema together with a picture of the heater core. Do you think that the white scaly stuff is the beginning of a leak?

A small update, all of the servo motors are ok so now i am left with the problem of the compressor engaging and disengaging intermittently. As per Steve's suggestions this could be either the trinary switch or the frost switch. How can i test these and can the frost switch be bypassed, or will it harm the system?

I had to dismantle the aircondition pipework to get the evaporator box out, what is the procedure when refilling with gas?


Thanks for all your help.

Ryan

[Alfisto Steve]

Quote:

Originally Posted by Ryn079 Steve you are simply the best! Thanks for answering my questions. One last thing....were you the creator of the 164? It looks like you know everything about this car. Nothing more to be said than a very big thank you! Ryan