00 Seville no heat

CarKey · #1 (**permalink**) 10-17-09, 10:13 PM

I just purchased a 00 Seville SLS, I've had it for about 2 months. Today just discovered the heat doesn't blow hot. Took it to firestone, they say the Thermostat and Blend doors aren't opening, small leak in radiator and there is a coolant leak in the reservoir. I'm replacing the thermostat and desperately looking for a used reservoir to avoid paying a grip at the stealership. Any ideas on how to get the blend doors to open and get some heat? No overheating happening, the usual check coolant light came came on after leaving firestone, reservoir is low. Can I put something in to seal the leak?

chubbyranger · #2 (**permalink**) 10-18-09, 08:51 AM

Do not try any magic leak sealer other than the OEM recommended Barrs Leak seal tabs and they obviously aren't working. If the thermostat was not opening you should have been overheating - maybe it was stuck open? Did the car operate at normal temp? As for the reservoir (a.k.a. the surge tank) try junkyards (www.car-part.com is a good locator tool). Some people here have also fixed their tank leaks using JB Weld for plastic but it usually seems to be only a temporary fix. Pull codes to find your HVAC problem - see the sticky at the top of the main forum page.

CarKey · #3 (**permalink**) 10-18-09, 10:48 AM

Thanks, I will look today for the reservoir. The temp gauge always was halfway, it might go a hair to the right but never overheated. I'm going to change tstat now.

submariner409 · #4 (**permalink**) 10-18-09, 11:32 AM

Also try Amazon for the surge tank. They had late (2000+) Seville tanks for $69, shipped, a month ago.

If your temp gauge was sitting at about 12:00, 1/8" either way, your thermostat is perfectly fine. It begins opening at 188 and is fully open at 206. The engine should always run at about 200+, but if the entire A/C system is OFF, temp will go to 224 in traffic, the fans will go to slow, and the temp will come back down to 212. Fans run in slow any time an A/C function is commanded, and they run on engine temp control without A/C commanded.

Either the temp blend door(s) are not working or the heater core's plugged.

Read the entire sticky at the top of this Seville Forum main page "How to pull codes". Get your DTC's from the car's built-in system, go back to the link to find out what the (if any) P,B,C, and U codes mean.

CarKey · #5 (**permalink**) 10-19-09, 11:35 PM

Ok, Today I replaced the reservoir, I got the codes the only codes that are current are
ABSC1246

History: ABS C1243 1282/1282,1287
V1000
B1321
Dim 1324
U1060

No amp, ddm, dim, ipc, ipm, irc, pcm, rfa, rim, rss, sdm, vtd, ddm codes
Help... What does this mean for my heat the only one even remotely close is B1321 - A/C Low Side Temperature Sensor Fault. How do I get my heat working I'm freezing.