bcrosby
20+ Year Contributor
- 75
- 0
- Jul 11, 2002
-
Des_Moines_Iowa
What would make my heater not blow hot? Now that its getting cold out ive noticed that my heater just doesnt blow hot. Could it be the thermostat? Any ideas would be appriciated.
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Looks like this thread has already been revived, so I'll chime in as well.
I know it varies from model to model and car manufacturer, but I feel as if the 2G DSM heater doesn't get as hot as some other cars (like a Mercedes or a Focus). It's just around freezing in my area and even though I get lukewarm air quite early on (when engine temp is around 40-50 C) [104-122 F], by the time my coolant reaches full operating temp (88-90 C) [190-194 F] the heater on full blast (setting 4), set to outside air + torso direction and full hot, I would describe the air as warm. Like maybe about 25 C or 77 F. Would that be the usual full hot temp that comes out of the blowers on our cars? Or does it get much much hotter?
I also just finished flushing out just the heater core with tap water + garden hose, and it didn't really look all that dirty or stained. I also have a new-ish stock thermostat.
if it was a head gasket then you would see white smoke comeing out the exhaust and you would be losing coolant.Steam at atmosphere will not go above 212*F, but if he had a leak large enough to bleed off all possible system pressure, chances are he would not be asking why he is overheating. That is usually a case where a radiator hose has completely burst and spewed out enough coolant for almost any motorist to see.
My stock gauge will begin to rise on my car at anything past 225-230*F or so, meaning that as long as he has over 6psi of pressure the gauge will pick up steam temperature as overheating. I don't mean to say that his cooling system is FULL of steam, I'm just saying its more than likely an ingredient in it.
If his problem is more complex such as a headgasket failure, the burst in the gasket will cause cylinder pressure to leak into the cooling system causing more pressure. I ran into this problem when my headgasket went. All of my little coolant lines began to burst every time I drove it causing massive headaches and many purchases of rubber hosing and coolant until I could fix the problem.
But yes, when he posts back more information we can solve the problem better.