- Buick Ownership
- 2001 Buick park avenue ultra
I am a new sign in to this site and am looking forward to all the help and wisdom shared here. I have a 2001 Buick park avenue ultra and I drove it home and the heat seemed like it was working properly. The temp gauge was showing 185-195 the whole drive home.(the car only has 84,000 miles so I’m assuming it had the factory 210 thermostat. Well I drove it to work with my twin the other day and it would not get hot. The temp outside was 16 and we were doing 80 down the freeway and the temp gauge only showed like 140-150. This the air never when got lukewarm. I have since replaced the thermostat due to speculation that it was bad due to it not getting hot. So I put in a 180 temp thermostat(I have always run my stuff a little cooler.) Well after that the temp thing was not fixed and I have been burping the cooking system for the last couple days and to no avail on it getting past lukewarm. I used a temp hun and checked the hoses and thermostat housing the housing was up to 190 and the hoses only showed 160 to and 140 lower. My question is do you think it is heater core?(still has factory dexcool) or a blend door problem? Also inside the cab it sounds like the blower motor is going to town and moving a ton of air but it’s hardly noticeable from the vents(I replaced the cabin air filer) I have heard of a temp switch/resistor and also of blend doors. Where are these things located? Also where would I be able to purchase them?