Bmw 316 i se . The heater is blowing cold air even when the climate control is reading 32 degrees. Is it the thermostat or something - if so where do I get 1 , how do I fit it etc Is it manageable without going to garage?
2007-03-16 03:24:35 · 9 answers · asked by steve l 1 in Cars & Transportation ➔ Car Makes ➔ BMW
most of the previous answers combined were correct.
it could be the thermostat, it could be a block in the coolant lines caused by a cracked head or dislogged head gasket, a faulty water pump, or a faulty heating valve (not easily fixed) if the temp reads a constant 32 degrees, then thats a different problem.
yes, you can check these things without going to a mechanic, but some of them are time consuming.
The first thing you do is replace the thermostat... the old time method of checking the thermostat is to plunge it in boiling water, if it opens its ok, but this isnt always conclusive, just replace it, its cheap and easy.... you follow the coolant lines until they run into a plastic housing, take it off and youll see the thermostat.
http://www.realoem.com/bmw/diagrams/b/f/4.png (5 is the thermostat)
The next thing to do would be a coolant flush. This can be done by yourself for $30-40, but its much easier to take it to any oil change shop, and they can do it.... or you can try to flush the heating coil, and leave the rest of the coolant as is. The way you do this is to get into the heating coil box... pull off the two rubber lines and spray a hose into one end, so it comes the other.
For a full coolant flush, you drain out the coolant out of the block (unhook the bottom radiator hose), you put more in, you drain it again, then finally fill it back up.... after you refill it, you need to bleed the air... You do this by opening the 8lb psi cap on the radiator, then start the car and turn the heat on high, it will bubble for a few seconds, then put the cap back on. it will repressurize itself (as long as the water pump isnt faulty)
So you do those, and you still have no heat... the next thing to check would be the heating valve, that allows coolant to enter the coil.... unfortunatly, i dont know e36s well enough to describe how to check this.
A faulty water pump can easily be checked... if its leaking, its faulty.
Those are a start. Do the things listed, and if you still dont have heat, ask another question inhere with the things youve done to try to solve the problem.
2007-03-16 05:33:27 · answer #1 · answered by Anonymous · 0⤊ 0⤋
your heater door might not be opening to release hot air and might be trapped blowing out the ac door. You can't do it yourself, they might have to go through the dash. Or it might be your heater core.
2007-03-16 03:30:20 · answer #2 · answered by fourcheeks4 5 · 0⤊ 0⤋
It could be a blown Head Gasket or a head gasket about to blow - thats one of the signs of that!
2007-03-16 03:32:27 · answer #3 · answered by libbyft 5 · 0⤊ 0⤋
it's your thermostat and it's easy to replace on most cars and fairly cheap. mine was $7 and it took me 15 min.
2007-03-16 03:33:41 · answer #4 · answered by Anonymous · 0⤊ 0⤋
most likely the thermostat needs replacing
2007-03-16 03:31:52 · answer #5 · answered by Denise W 4 · 0⤊ 0⤋
Check your radiator water (It happened to me once, and I managed to crack the head and bust the water pump too!)
2007-03-16 03:41:06 · answer #6 · answered by Janbull 5 · 0⤊ 0⤋
my 540i sometimes blow cool air but you shut it off and turn it back on it will be fine. is this the control or something else
2015-02-22 08:42:41 · answer #7 · answered by troy 1 · 0⤊ 0⤋
it may be the heater matrix
2007-03-18 07:40:15 · answer #8 · answered by Anonymous · 0⤊ 0⤋
buy a better car
2007-03-17 23:32:08 · answer #9 · answered by Anonymous · 0⤊ 0⤋