Hi, I m new to this forum and just bought a bonnie sse 1996with 234k on it. I been reading the forums and I think my problem is similar to others. Its the A/C and heat problems. When i want A/c. It starts right away when car is cold. But when i want heat when car is cold i get cold air. When car is hot and i want cold air, its giving me hot air. This morning when i was driving i wanted heat and i wasnt getting it but then i heard somthing shutting and bang heat. When I stopped and then started the car again, cold air once again and i left the car on heat before i shut it off. I am taking car to mechanic. I just wanted to know what I should tell him to look for. I m guessing somthing to with the door that lets the cold and hot air.
Also 1 more question which i couldnt find. Which was I replaced the thermostat but yet still the temperature on the gauge in the car seem to be quiet high like the needle reaches 3/4 when its really hot outside but stays just past half way while i drive. Should i change the thermostat to 160 degree one? would i have heat in the winter. Please help me, I m willing to pay for the answer, as i m not mechanically inclined.I hope i dont have to pay too much for repairing all this. How many hours do think will the mechanic take to do all this.
Thank-you so much in advance.

As far the A/C and heat. it does sound like your air mix actuator has proabbly failed. The part istelf is not that expensive, but almost all shop manuals will instruct the mechanic that the dashboard will need to be removed, so labor adds up quick. Here on the club, we have had many successful replacements without the dash being removed, but a repair shop may not be so keen on following our instructions vs. using a shop manual.

As far as temps, there could be many issues that result in runnning hot.

If it were me, first, I would like to know if the gauge was truly accuarate before tearing things down. Also, I would want to insure that the cooling fans were both operating.

You may have an air bubble in the system that prevents the system from fully functioning properly.

Much of the temperature fluctuation may depend on where you live and drive. Hills do seem to make the engine heat up more quickly than flat terrain. Humidity may also play a role in the spped of which the system can cool the car.

A 160* thermostat would only open sooner, so you may still end up with just as high of temps as before. I wouldn't change it out.

Also, I did forget to mention that there is a delay built into the system where you may not get cold or hot air right away..it'* about 45 seconds if I remeber, even if you leave the selector on hot or cold. Maybe you don't really have a problem, an dit is just the delay in the system.Has your car just recently started doing this or had it been like this all the time.

I found some info on the air mix actuator replacement procedure.

I found all of these by tying in "mix+actuator" (includingthe "+" symbol) in the "Search" function at the top of the Bonneville Club, (underneath the red Bonneville car) screen.

sign"Here is a write up donme by SSE Motorhead forseveral air problems. You (or your mechaninc) would want to follow the "Air Mix Actuator" instructions

http://trialsnuts.com/ecc.pdf

Other random posts about the actuator:

http://www.bonnevilleclub.com/forum/...t=mix+actuator

http://www.bonnevilleclub.com/forum/...t=mix+actuator

There are many more if you do the "Search"