Question about 2003 Mini Cooper

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Not enough heat in cabin

Running ETC is always between thermostat opening and closing range

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It's common to see the mini heater cores clog up a bit and deliver poor heat. Most likely you need a new heater core. Not really a DIY job unless you're experienced. You could try pulling the heater hoses and flushing it out with the hose.

Posted on Dec 07, 2013

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I have a 2003 Chevy venture the heater will not blow out hot air an the temp keeps overheating what's wrong with it

check coolant level and color if milk chocolate head gaskets blown.or bad thermostat stuck shut
any white stinky smoke coming from tail pipe?

Nov 24, 2015 | Cars & Trucks

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Code p0128, my check engine light came on a few days ago so I checked for the fault code, a P0128 code shows up in the dash, Recently my engine was totally rebuilt and the thermostat was left out due to...

Yes. Without the thermostat your engine cannot run in a closed loop, if it happens not to be very hot at the time you run your car, or you run it in the shade, then the engine does not have enough time to heat all of the water in your cooling system.

With a thermostat it only needs to heat a small closed loop to begin with, once this is up to temperature it will allow further fluid through from the rest of your engine.

While running your engine like this occasionally is not going to destroy it (it won't be much different to running it in, say, a particulary cold country with a thermostat), It will prevent the engine from attaining its prime temperature range quickly. I would never advise taking the thermostat out, when the coolant is sufficient warm it will run in an open anyhow, so having no thermostat will not increase cooling capacity.

Nov 04, 2013 | Chrysler Concorde Cars & Trucks

2 Answers


Air Temperature Control Blend Door Failure No Heat or no AC (dependes on where door sticks)

In all modern cars there is a tiny DC electric motor driven gear drive that moves a plastic door that blends heated and cooled air from the AC and the heater core, this is called (interestedly enough) the air temperature control blend door actuator. The motor that moves this door fails because the door starts sticking from warping, most common complaint is no heat but it can be no AC as well. To replace these parts (blend door and blend door actuator) you must remove the entire dash from the car. Always have this problem confirmed by a dealer or qualified repair shop as it is a very expensive repair.

Other causes of no heat in the cabin are engine thermostats that are stuck open (engine runs cold) or air bubbles in the cooling system.

Nov 05, 2012 | Cars & Trucks

1 Answer

No heat when stopped for traffic

1-your thermostate is stuck open half way. thermostate is a simple device that made of enlarging metals when heat is applied. it suposed to be in close position to allow engine heat up, when specified temp reached it opens and let it flow and radiator tries to keep coolant cool.when it is broken it stucks or it acts slow or it wont acts at all. in your situation it is stuck open half way. it allows enough water to be heated but flow is limited to heat cabin heater.

2-if there are cabin heater selenoid/selenoids for two different temperature for cabin left and right, on some instance those selenoid valves to adjust cabin heater stuck open or closed like thermostate acts on first case. so heat is not enough to heat up cabin heater.

Nov 18, 2011 | 2005 Chrysler Sebring Conv

1 Answer

I have a 2000 Mercury Cougar and the gauge inside tells me that the engine is over heating, no heat is coming from the heater when I turn it on, the fan for the engine is running at full blast, the engine...


The overheating and lack of cabin heat both point to a failed engine thermostat which would be stuck closed. At the warm up stage, the coolant stays in the engine block to bring the engine to efficient operating temperature, then it opens and circulates the coolant through the radiator and heat core. If the thermostat is stuck closed, the engine will overheat, and coolant will never reach the heater core, and you will not get cabin heat.

Blinking oil light at idle which goes away during driving could be a low oil level, but may also be a drop in oil pressue. You could have a clogged oil fliter (at best) pickup tube, or a failing oil pump.

Mar 10, 2011 | 2000 Mercury Cougar

1 Answer

87 jeep Comanche running up to 220 to 230, the boils when shut off. New radiator, new pump, new hoses, new thermostat, belts tight etc.. Is there two different pumps for this truck? Each running in the...

Your thermostat seems too low, all emission stuff will not shift at too low of temp. There is nothing wrong with a 230 or higher heat soak condition. Pushing out coolant, however is inconvenient...If you are topping it up each time, consider trying to let is spit out during this heat soak and just drive may stabilize after a time or two.

You cannot do anything about heat soak, except electric fans, but engines have always done it, it is physics and causes not harm.

Doubt there would be a different pump direction.

And I think 195 may be the temp that you want in thermostat... parts place has the spec.

If overheating, fix that, but your description did not say you overheat on the road...I would not get worried until gauge pegs.Temp is a good thing... Too low thermostat leads to premature engine failure and unnecessary emissions. you NEVER heat the oil enough at too low temp.

Sep 05, 2010 | 1987 Jeep Comanche

1 Answer

No heat bought heater treater what does code 14 mean?

1st, what is 'heater treater?' Is this something you add to the cooling system? Is your engine temp gauge in the normal range, or is the jeep running at the cold end of the temp. gauge? Is the fan for the heat/and a/c working? There are several reasons you may not have heat.
1.make sure coolant level is ok, low level will cause a no heat condition.2. If engine is not warming up properly (running at the cold side of temp gauge), you may have a thermostat that's stuck open, not allowing the engine to reach operating temp-result, no heat.3. If you can hear the fan blowing for the heat-a/c, but not feel it blowing at the vents, your 'blender door' (opens and closes to allow heat-a/c to enter the cabin) may be stuck closed. I had a Jeep (4L engine, but older than yours) which had a valve in the heater hose line that once froze up (stuck closed) and resulted in a no heat situation. If the heater treater is something you add to the radiator, I wouldn't waste the $ to use it, as it probably won't help this problem. Your codes: I could find no code 54, #14 is 'B' camshaft position sensor -timing over advanced, or system performance bank 1.

Nov 17, 2009 | 2001 Jeep Grand Cherokee

2 Answers

Hi my rangerover heater is blowing out cold, everything else is working just the heater isnt...

Most likely your thermostat has failed and is stuck open. Engine coolant goes through the heater core and is used to heat the air that is blown into the cabin. If the thermostat fails, the coolant doesn't stay inside the engine long enough to absorb enough heat to make the climate control air blow hot. Change your thermostat (flush the coolant and have it replaced while you do this), and you should be back in business.

Nov 08, 2009 | 1999 Land Rover Range Rover

4 Answers

2004 Mazda MPV cabin air is just not getting hot enough.

If changing the thermostat didn't work, have the heater control valve checked, it may not be opening all the way to let the coolant circulate thru the heater core fully.

Jan 21, 2009 | 2004 Mazda MPV

1 Answer

Heater works good then all at once starts blowing cold air

You will have to replace the thermostat...It sounds like the thermostat is not opening and closing all the way. When the car is running fast enough to heat up the water, great...heat...but at stops the thermostat is not closing all the way allowing the water to cool as it passes through the heater.

Oct 28, 2008 | 2003 Nissan Sentra

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