My car only blows luke warm air. The engine temp is fine, and all of the vents are set to the right position. My local shop wasn't sure what was wrong.
I think it's probably the coolant diverter valve not opening enough to let 100% of the coolant to flow to the heater core. The shop thinks it's the flaps not letting the heat from the core to be blow directly to the vents.
Anyone have any ideas?
Driving 45 minutes to work everyday with -20F temps sure does suck!
Same problem. Living in Minnesota with some cold ass days and no heater sucks. My heater isn't blowing hot air and my AC doesn't blow cold air. My car came from Texas-do u think the thermostat could be to blame for the non hot air?
might be your water pump. OEM pump is weak and often breaks and causes serious problems anyway. Replace it with one with bigger impellers and it will flow more coolant over the heater core, giving you hot air.
It's your microfilter under your glovebox. Replace the filter. It tends to collect alot of gunk, leaves, hair, lint and dust and restricts proper air cirulation. Thus A/C air is warmer than desired and Heatiing is cooler than desired....cause after awhile it's just diverting air into your cabin from outside.
These Filters is an easy DIY and should be done every 10,000 miles.
See the DIY section.
Filter was replaced this summer. I'm leaning towards the coolant valve. This weekend the temps were in the mid 30's. Not exactly warm out, but it was warm enough to allow the car to make some heat. It seems like there is some coolant flowing to the heater core, but not enough on the bitter cold days.
Has anyone changed there coolant valves themselfves? I tried tapping it with hammer and socket to see if the vavle would unstick. It looks like it would be a major pain in the ass to replace!
No it may not be the valve! I just replaced my coolant and had my valves and all the components checked and replaced at the BMW dealership last november (and as you know when it comes to taking your dough they don't miss a thing)! Anyway...Early Jan. I had the same problem as you when the temp dropped to around 1-10 degrees F. I found my car did not heat up at all. And the air was warm, also my engine stayed cold for longer (which is normal) So I found out I needed to replace my filter. I did but the cabin heats up now like normal, but certain days when it's really cold I find that the heating is somehow related to the engine temp. when the engine is cold the air that comes out the vents is NEVER hot but gets warmish. I guess this seems normal cause its the reality for most older cars like ours.
My filter is only six months old though, and I don't live in a dusty neighborhood. I haven't had to drive through any construction on a daily basis either. I'm finding it hard to believe that my filter could be clogged after half a year.
ok my problem on my bimmer is that when i set it to defrost it gets hot but when i set it on the feet or to the face it blows cold. could this be the filter? and the a/c just blows air and the a/c condensor is full with the chemical stuff.
check your coolant level, and then add some if needed and then bleed it. this is probably the reason why you arn't getting the warm air desired. there is a little screw that has a plus on it (its plastic) and its right next to the cap on the overfill reservoir. turn on the car, and open up the screw and keep adding coolant, squeezing the upper hose and revving your engine a bit untill you see a nice steady flow of coolant comming from the scerw. then close it back up and you should be all set.
Originally posted by 3serbmdubya@Feb 14 2005, 08:48 PM check your coolant level, and then add some if needed and then bleed it. this is probably the reason why you arn't getting the warm air desired. there is a little screw that has a plus on it (its plastic) and its right next to the cap on the overfill reservoir. turn on the car, and open up the screw and keep adding coolant, squeezing the upper hose and revving your engine a bit untill you see a nice steady flow of coolant comming from the scerw. then close it back up and you should be all set.
why would be be the coolant? isnt that suppose to cool the engine which makes no sense because I want hot air to blow. correct me if im wrong and what about my ac?
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