ps2cho

Have a friend who's A/C was diagnosed as a bad expansion valve...I've done one on my current 87 Mercedes 300E, but wondering if its an easy DIY on this car?

Any info or factory manual information for this?

I'll have an A/C shop evacuate the r134a, I'll take it home, replace the valve, then give it back for them to again evacuate and charge accordingly.

I have my own A/C manifold gauges too, and understand the basics of A/C when I replaced my evaporator + expansion valve about a year ago on my benz.

Thanks

LeX2K

Which car?

Doing this involves significant dismantling of the interior. You will have to remove many trim pieces, glove box, probably CD changer, amplifier, ECU, blower unit etc. to get to the condenser. The expansion valve is at the top of the evaporator firewall side. Here's a diagram to give you an idea of the layout (1997 ES shown).

schan1w

https://www.clublexus.com/forums/es3...dryer-diy.html

lexluva

I had the expansion valve changed last summer and the a/c was ice cold which was great because we had a really hot summer. This winter I realized that the heat heats the cabin initially then it just gets cooler. In other words the temperature doesn't stay consistent. For the cabin to stay warm I have to turn the temperature up manually after 15 mins or so. Someone on here suggested that it could be the room temperature sensor not connected when they did the expansion valve, could this be true? If so is this easy to get to or does it need for the whole dash to be taken apart? The pic also has evaporater temperature sensor, what does this do? Thanks!