Air Con working intermittently

SUBYDAZZ · Post by **SUBYDAZZ** » Wed Nov 08, 2006 1:44 pm

Having this intermittent problem with my A/C. Sometimes (increasingly more often) when the A/C is on, there is no cooling effect, the compressor is definitely engaged, as you can feel it load up the engine, but it just doesn't cool. Sometimes you can turn it back off, and then back on and it is fine, othjer times it just doesn't want to know about it for 10-15 minutes or so.

Ideas?

Onyl other history of problems I've had was on New Year's day this year. It was 46oC and at 110km/h on freeway with 5 people in car it just didn't cool at all. (was there a worse day for this to happen?) Slowed down to 80km/h and came back good. Just put that down to unusual load / weather combination).

This is a 92 Lib.

Subafury · Post by **Subafury** » Wed Nov 08, 2006 8:26 pm

it may need re-gasing.

Suby Wan Kenobi · Post by **Suby Wan Kenobi** » Wed Nov 08, 2006 9:43 pm

Could be the TX valve i have had it happen on a few early Libs

SUBYDAZZ · Post by **SUBYDAZZ** » Thu Nov 09, 2006 4:17 pm

Dave, what and where is the TX valve and how hard do I have to boot it?

SUBYDAZZ · Post by **SUBYDAZZ** » Thu Nov 09, 2006 4:18 pm

subi wrote:it may need re-gasing.

I'm not familiar with this but if it needs re-gassing would it still be really cold when it was working or does it gradually get less and less cool over time?

Xtreme_RX · Post by **Xtreme_RX** » Thu Nov 09, 2006 4:37 pm

Gradually gets less cool over time..

The TX valve is inside the evaporator case in the car. The box next to the fan..... It’s a BIG job to do.

Suby Wan Kenobi · Post by **Suby Wan Kenobi** » Thu Nov 09, 2006 5:55 pm

TX = Thermal Expansion valve

SUBYDAZZ · Post by **SUBYDAZZ** » Thu Nov 09, 2006 8:26 pm

Xtreme_RX wrote:Gradually gets less cool over time..

The TX valve is inside the evaporator case in the car. The box next to the fan..... It’s a BIG job to do.

Are we talking pull the whole dash out here? Some techy give me the lowdown on what it does and what needs to be done to pull it and replace, are we talking A/C mechanics here?

Suby Wan Kenobi · Post by **Suby Wan Kenobi** » Thu Nov 09, 2006 9:59 pm

Basically the easiest way is to replace the Ac evaporator unit

SUBYDAZZ · Post by **SUBYDAZZ** » Sun Dec 23, 2007 11:41 am

To close the issue, this ended up being the actual switch on the control unit. As replacing the switch requires replacing the entire control unit at about $600 from Subaru, I found an earlier model unit that worked fine at the wreckers for about $20. Will take it easy on the switch now...

Case closed.