It just so happen my '98 buick park avenue had same problem.. It all started when the battery was dead; left sitting for three weeks. I used slow charger overnight at 2 amp setting, work fine until noise coming from inside the dash, sound like actuator trying to close a valve; before this happened I did disconnected my negative cable to install an electrical item. I tried troubleshooting every conceiveable search on fuse, loose wiring and ohmmeter; the noise was driving me crazy. Still my battery was losing charge when I left parking few days, now another problem; driver side has heat and passenger has cool air, and can't get the heat or temperature change. Even when I shut off climate system, hot air still vent through the driver side even when the control is off. I went online try to read up other identical problems. One guy mentioned disconnect the battery positive cable and leave the negative intact for 30 minutes; wrong! Wrong! You never disconnect positive cable until negative cable first disconnected, law of electrical theory. What I did was disconnected neg (-) cable, then disconnected positive (+) cable, waited 40 minutes; reconnected pos (+) cable, then the negative (-) cable. Be very careful not making metal to matel contact when tighten cable's nuts. This will reset the computer brain to original setting. That'd eliminate the actuation noise; the temperature malfunction heater on driver side and cool air on passenger side are working perfect. One more thing, the negative cable was not tightened when I disconnected the neg cable to install an elect. Item. This could have caused changes in voltage going to the computer box. Hope I didn't bore you guys but i'd find many similar cooling and blower motor problems posted on buick forum. I hope this information help. Make sure both battery cables are tightened whenever loosen for any reason. Fireside
Wednesday, September 28th, 2011 AT 4:09 AM
