Question about BMW 120d

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Bmw 120d heater not blowing hot into off side of vehicle.works ok on near side can you help

Replace thermostat,theb replaced heater control valve

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  • BMW Master
  • 5,309 Answers

Sounds as if a flapper door is not working. Vacuum line leaking or bad actuator.

Posted on Dec 02, 2014

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6ya6ya
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Posted on Jan 02, 2017

emissionwiz
  • 75130 Answers

SOURCE: 1997 F150 heater problem

your problem is caused by the air temperature control blend door actuator motor being defective, the little motor moves the door that gives either hot air or cold air or a blend of the 2.

Posted on Feb 21, 2009

  • 1 Answer

SOURCE: Climate control driver side blowing only hot air.

is it low on free-on?

Posted on May 18, 2009

  • 1619 Answers

SOURCE: merc c class heater problems centre blowing cold and sides hot

Bad vacuum pod, try using a mini vacuum and the on the valve block behind the glove box take suction on each one till you find the bad one.

Posted on Jun 15, 2009

  • 1 Answer

SOURCE: My 97 BMW Z3 keeps overheating

I too had similar problem when replacing the thermostat on my Z3. My advice is top up with more coolant and check the level.

Posted on Jan 06, 2010

  • 2 Answers

SOURCE: heater blows cold air. I have replaced thermostat,

Not an expert by any means, but i know my ranger.. I had a small leak at the top of my radiator that still cooled the engine but didnt have enough pressure to get to the heater. The heater hoses travel up over the engine and just were not gettin anything to my heater core. That or make sure the heater control valve is operating.

Posted on Apr 16, 2010

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Bmw x5 heater blows cold


Replace the thermostat.

Oct 21, 2013 | Cars & Trucks

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1993 dodge caravan heater problems


There should be a vac controlled valve on the heater hose near the firewall. If that valve fails, or something happens to the vac source, the valve will not open or close. I would check that valve and make sure it is working. Both heater hoses should be hot when the engine is warmed up.

Dec 08, 2012 | Cars & Trucks

1 Answer

My 1996 heater isn't blowing out hot. How do I fix it?


Check the heater control valve. Usually located on a heater hose between the firewall and where the hose attaches to the engine. Warm the engine, turn the heater on full hot, feel the hose with the valve in it. If the hose is hot on both sides then the valve is probably OK. If hot only on the engine side of the valve then the valve is not opening when the control calls for heat. Probably a stuck valve or leaky vacuum control hose. Otherwise I would suspect either a clogged heater core or a stuck open engine thermostat .

Jan 22, 2011 | 1996 Mercury Sable

1 Answer

My heater doesn't seem to want to get hot. I have done a radiator flush with new antifreeze, changed the thermostat and it's still blowing out hot air.


If it's not blowing out hot air, the blend door may be the problem on the 1990 Isuzu Trooper.

Heater Water Control Valve REMOVAL & INSTALLATION On early models the heater control valve was part of the heater core inlet. To replace the control valve, remove the heater core as outlined in this section. Remove the control valve from the heater core, being careful not to damage the core. Use new gaskets when installing new valves. The remainder of the vehicles are not equipped with heater water control valves. They use heater unit doors to regulate the amount of heat entering the vehicle. --- I would check that both tubes running to the heater core are getting hot. If they are, then there is a blend door problem. If both tubes are not getting hot, the heater core is blocked somewhere or the heater control valve, if so equipped, is in need of replacement. Good luck on this repair. prev.gif next.gif

Oct 28, 2010 | 1990 Isuzu Trooper

3 Answers

My S-type heater is not working. Blowing only cold air. Also, The temp gage goes from cold to max hot within five minutes of starting the car. Any ideas would be appreciated


Hi There
I have had the same problem, if the climate control shows different temps at either side it most possible that the heater valve needs replacing, the valves inside get rusty and sieze up, it is situated at the front o/s at the side of the radiator. If temps are the same could be the control module

Jan 14, 2010 | 2000 Jaguar S-Type

3 Answers

Would the heater control valve malfunctioning make the engine overheat blowing hot air out the heater one moment,then not blowing the hot air, temp gage spikes 225 plus. The motor takes awhile to heat up...


Heater control valve malfunction will not cause engine to overheat unless coolant is leaking externally...Overheating going down the road can be the result of a few different things...Partly clogged radiator...Insufficient air flow due to possible fan problem...External coolant leak...Make sure fans are operting properly and have cooling system pressure tested for leaks...Gaining and losing heat on the inside of the vehicle usually means system is low on coolant but you must find out where coolant is going

Jan 06, 2010 | 2004 Chevrolet Impala

2 Answers

1998 jeep cherokeesport


Follow these steps:

Check coolant level, then start engine until it is warm and the thermostat opens. You will tell when it does when the needle on your temp gauge goes cold when it reaches around 180-200* and then goes back up. Now turn on your heater full blast and go to the engine compartment. You will see a heater valve located on the passenger side, next to the washer reservoir. It is a black thing with 4 heater hoses connected to it. Feel the hoses. When everything is working correctly it should be like this:

Hose going to waterpump will be hot
Hose going to (I think the thermostat housing) will be hot
2 Hoses going to heater core (mounted behind firewall) will be hot

1. If only 1 heater core hose is hot, heater core is clogged--
UNCLOG: remove 2 hoses going to heater core when engine is cool, hook water hose end to one of the sides and flush out gunk from heater core. Reconnect hose and you should be good.

2. If neither hose core hose is hot, heater control valve is bad or vacuum is bad--
Test Vacuum: remove vacuum line from heater control valve, you should feel the vacuum **** on it when pressed to your cheek and the heater control valve actuator should move when you unhook the vacuum line. If you have a good vacuum, it's probable the valve available at autozone part # 5941 for around $21.

To get heat while you wait to replace part, unhook silver arm on heater control valve that is hooked to the plunger. This will give you heat all of the time, but it is controlled by the bottom hot/cold switch on your heater control unit so you won't get hot in the cab. It will just circulate heat through the core.




Oct 25, 2008 | 1998 Jeep Cherokee

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