My heat ( only blows cold air) won't work and my car seems like it's going to overheat. What could this be?
First, start by replacing the thermostat. It's located under the coolant filler cap / thermostat housing on a 2.4L dohc engine block on the upper left (passenger side)of the engine. We just replaced one in ours, but when we took the thermostat housing off, we discovered that the thermostat had broken/exploded, and that the lower thermostat spring and retainer were probably stuck inside the engine cooling galleries. We ran the car without replacing the thermostat, but it did not improve. The engine was still getting hot, and the heater blower still wasn't blowing hot air. We're going to try to replace the thermostat with the correct one (parts place gave us the wrong one and it didn't fit at all...), bleed the air out of the system again and see if there's some kind of link to there having to be a thermostat in the system. If that doesn't fix it, I'll have to look at the water pump to see if it's actually moving the water or not. If the water pump isn't functioning, the water isn't getting moved from the hot block to the radiator (where it's cooled through the radiator and goes back into the suction side of the water pump). If the pump is fine, and the new thermostat doesn't fix the problem, we'll have to investigate the possibility that the thermostat parts that got into the water galleries is somehow restricting the cooled water flow back into the engine, and that will be an expensive fix, I presume. Like all other cooling system problems though, start with replacing the thermostat. It's fast, cheap and will let you know where to look next if that doesn't fix it, but that problem is usually only a thermostat issue.
Feb 09, 2011 |
2002 Chrysler Sebring