Questions tagged [heater]

An assembly to generate heat inside the cab of a vehicle, frequently taking hot air off the engine block and sending it into the driver's compartment.

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17 votes
6 answers
49k views

2000 VW Golf heater won't blow hot air

My 2000 2.0L Golf GLS won't blow hot air at operating temperature, the air is only lukewarm at best. This started a few months ago inexplicably. The car isn't overheating or underheating, it reaches ...
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11 votes
5 answers
34k views

Keeping windshield ice-free without heater

What options are there to keep the windshield more or less ice-free during extreme cold (-30 degrees) without using the heater of the car? We are currently on a road trip through the Baltic states ...
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10 votes
1 answer
3k views

Why would a mechanic crank heater to maximum

This is a curiosity question. I recently had the timing belt, tensioner and water pump replaced on my Honda Odyssey. When I picked up the van it was really hot inside but I didn't think much of it. ...
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10 votes
2 answers
114k views

Heater blows cold air at idle

I have 2006 VW beetle with the 2.5L engine. Once the engine has warmed to operating temperature, and I am driving it around, the heater works great. As soon as I stop at a red light, or am idling for ...
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  • 171
9 votes
1 answer
615 views

Excessive Coolant Expansion: Part 2

This is a continuation of my excessive coolant expansion question regarding my 98 Mazda 626 2L. When I drained the coolant I noticed this black sediment which settled to the bottom of the container I ...
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8 votes
5 answers
33k views

Should I use the heater while warming up my car?

I know that you should drive off immediately to warm up your car as your entire car will warm up faster this way. However, the common practice to defrost the inside of your windshield is to blast the ...
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  • 467
8 votes
3 answers
581 views

Is there a type of car heater that starts immediately?

I've noticed that most cars have a heater that takes a few minutes to start after the car has been started, presumably because it derives its heat from the engine which hasn't heater up yet. Are ...
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  • 81
8 votes
2 answers
1k views

No heat in my 2008 Pontiac Vibe

I changed my thermostat twice in a week on my 2008 Pontiac vibe. My car was blowing cold air and running hot but the thermostat would open up and it would go back down to normal. I would have heat for ...
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  • 81
7 votes
4 answers
2k views

What is more economic to run? Pre-heater or the engine itself?

I am currently sitting far up in nothern Norway and I am early for an appointment. So I figured I'd wait in the car for the time to pass. But since it's currently -15°C outside: I need to have ...
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7 votes
4 answers
11k views

2006 Subaru Forrester overheating and no heat

My 2006 Subaru Forester is overheating with no heat blowing through the vents. I have had a thermostat put in and a new heater core. Radiator has been pressure tested with no leaks. Unfortunately it ...
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6 votes
5 answers
18k views

Car overheats idling in traffic

I have a 2000 Chevrolet Impala. I recently had the water pump, timing belt, radiator, and thermostat replaced because I had a coolant leak/overheating problems. I now don't have a coolant leak, ...
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6 votes
2 answers
983 views

Is it efficient to use the cabin heat in my car?

As much of the United States struggles through the end of the nasty cold spell, a thought came to mind: Is it generally energy efficient to run the heat in my car? Let me be a little more specific. I ...
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6 votes
2 answers
4k views

Heat only works when engine is revving and at full power

On a 2004 Chrysler Sebring, the air only works when turned up to maximum power. At any of the 3 levels below that, no air comes out. Additionally, when the heat is on, it only blows hot air while the ...
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  • 707
6 votes
3 answers
103k views

Why does my car sometimes blow cold air while the heater is on?

This started about a week ago. I put the heat on and about after driving a couple of miles with the heat on it would randomly blow out cold air. Sometimes if I turned the heat off or switched it from ...
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  • 61
6 votes
4 answers
7k views

Heat blowing hot but only on low

I have a 2000 DODGE Ram 1500 v8. My heat only work while its blowing low and when I switch speeds it starts to get cold. I almost checked everything that could be check other than the wires.
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  • 61
6 votes
1 answer
19k views

Hot air only flows to vents, not to defrost?

I have a 1995 VW Jetta GL, 2.0 engine, 5 speed, a/c. My heater won't switch between defrost, floor heat or vents. It's stuck on the vents and I can't seem to find out why. I have torn apart the ...
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  • 61
5 votes
1 answer
21k views

When I set the air flow to Defrost, it turns on the A/C?

On a 2001 Honda Civic. Having the temp dial to HOT. When I turn the air flow dial from FRONT to Defrost (windshield), it turns on the A/C button and the A/C motor kicks in also. It just started doing ...
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5 votes
4 answers
7k views

Car heater taking too long to come on if at all?

My car heater is taking a long time to come on if at all. Anyone know what can be causing this? Just to note that I recently changed my engine because the previous engine overheated and the water ...
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  • 2,714
5 votes
3 answers
17k views

foreign object in windshield vent -dangerous?

I have a 2016 Renault Captur. My daughter dropped a small plastic toy (about an inch high) in the windshield vent (the one above the dashboard) and I'm unable to fish it out. How likely is this to ...
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5 votes
1 answer
1k views

Where'd my heat go?

My air vents blow out air. That's it. They do it well, too. Two weeks ago, when I turned it to high heat, the air was HOT. But now it's just air. The AC doesn't work either, but I know where that ...
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5 votes
6 answers
111k views

Impala no heat at Idle

I have 2006 impala that randomly will blow cold air at idle. Sometimes if I stop at redlight the heater will blow cold air. If I get the engine above idle by reving the engine to about 1K rpm it ...
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5 votes
2 answers
7k views

2012 chevy equinox blows hot air even shut off

We have a 2012 Chevrolet Equinox. We cant turn off the interior heat even when we turn the temp all the way down. Even when we turn off the heater it keeps blowing hot air. What could be the ...
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  • 51
5 votes
2 answers
4k views

2006 Jeep Commander - heat problems

My heater blows cold air at idle. and warms when driving. my temperature gauge goes up when the air is blowing. What could it be?
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  • 51
5 votes
1 answer
6k views

2011 Chevrolet Equinox: Heater blows cold air when set to defrost mode

For some reason, the heater on our 2011 Chevrolet Equinox 2LT (I4 engine) blows cold air when set to defrost mode regardless of the temperature setting. However, the heater works in any other mode. ...
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  • 335
5 votes
1 answer
4k views

Dodge Ram blower motor works intermittently

I have a 2006 Dodge Ram 2500 (5.9 L Cummins diesel). I’d replaced blower motor about 3 weeks ago and all was well until it started working intermittently. Resistor looked burnt and cracked so I’d also ...
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5 votes
2 answers
484 views

2003 Nissan Altima's heat is only lukewarm

My '03 Nissan Altima blows plenty of heat when the weather is warm. Now that we are into cold weather, it blows only lukewarm air when I have the heat on. The coolant level is okay. I had the ...
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  • 51
5 votes
0 answers
513 views

What causes more gas consumption - Idling with AC or Heat? [duplicate]

So I have begun doing some research on the effects of idling. So my question is, does idling with the AC or heater on affect how much gas is given off? If possible, please give the percent of extra ...
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4 votes
3 answers
1k views

How do race drivers clear foggy windscreens?

I know that, in order to decrease weight, race cars may remove AC and heating systems as these are not essential. However, when driving, if their windows get foggy due to cold weather, how do they ...
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  • 2,714
4 votes
3 answers
2k views

1996 Rav4 not warming up properly when driving and heat not hot

I have a weird problem. I recently changed the radiator and flushed the whole coolant system during replacing the radiator. I also flushed the heating core by itself. The thermostat was recently ...
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  • 125
4 votes
1 answer
54 views

Heater problems in 2001 F150

My heater heats up but quickly cools down when i turn the fan up all the way. If I leave the fan on two (out of three) the heat stays. The heat is gone within thirty seconds after turning up the fan. ...
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4 votes
1 answer
89 views

'00 Mercury Sable Heater Only Working at ~20% Power

I've had issue with the heater in my Mercury Sable for a number of years. Over that time span I've worked on it several times, with a range of results. History ~5 years ago, I had a garage look into ...
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4 votes
1 answer
1k views

Why is there no air flow thru my heater core?

I have a 1997 Ford F-150 with the 4.6L V8 engine. Heat has been an issue since I got the truck last fall. There is some heat in the cab, but very little. It is enough to defrost the windshield, but ...
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  • 9,035
4 votes
1 answer
216 views

Pacifica heater core hose reconnect

I have 2005 Chrysler Pacifica touring edition. A mechanic connected the two hoses together that should be connected to the heater core, because we had a water leak and he thought it would fix it. Well ...
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4 votes
2 answers
2k views

Heater not getting very hot

I have a 1999 Dodge Dakota. Early in the spring I had to have my heater core replaced. Now it is starting to get cold outside. When I run my heater it is getting luke warm at best. Before the ...
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  • 376
4 votes
1 answer
4k views

Car Heater Stopped Working...Kind of

Last night I was driving home and noticed that the heater wasn't blowing any hot air. I turned it up and nothing happened. I turned the fan-speed dial off, then turned it back on and hot air started ...
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  • 143
4 votes
1 answer
149 views

Wet conditions cause heat to come on full blast

Our 2006 Honda Odyssey minivan has a weird behavior with the climate control. When it is very wet, the heat only comes out at full blast when turned on, regardless of what the temperature is set to....
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4 votes
1 answer
2k views

Heater: High temperature only on high speed

I'm driving an Opel Corsa-C. Some weeks ago the heater stopped working properly. When I turn it on now, I get warm air for less than a minute. After that it's getting cold again. When I'm driving ...
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  • 143
4 votes
2 answers
3k views

01 sentra running hot

I have an 01 nissan sentra which had been running hot. If i start the car in the morning and turn temp control to hot and fan on and let the car warm up, i will have no heat and the car runs hot. Just ...
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  • 41
4 votes
1 answer
7k views

'05 Accord - No heat; changed thermostat

Alright so here's my problem. My 2005 Accord does not have HOT heat coming from the blowers. Sometimes it blows warmish. I just changed my thermostat today, and when I drained my radiator, the ...
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  • 41
4 votes
0 answers
675 views

2006 VW Jetta Diesel won't warm up [closed]

A couple of years ago the VW (2006 Jetta) quit warming up. No heat, no defrost, temperature gauge reads cold! I changed thermostat and tested both 'stats at the same time. Both opened right at 195 °...
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4 votes
0 answers
1k views

2011 Ford Fusion Heater Issue

The battery went dead 2 days ago. After a jump start I began my drive to work. I initially noticed heat and then heard a sound as if my blower motor turned up to 11 (it was already at max at this ...
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  • 41
3 votes
2 answers
899 views

Can running the heater with the A/C on damage your car?

I find that having the A/C on with the heater helps defog the car faster in the winter. Is it possible that doing this can damage the car?
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3 votes
4 answers
29k views

1997 ford f150 heater not working properly

I have a 1997 ford f150. New water pump, new thermostat 195°, heater core has been flushed out. Problem is the heat will blow warm for few mins then blow cold air for few mins. What else should we do? ...
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3 votes
6 answers
10k views

Should car heater be working when engine is on but I am not driving?

I recently had my car engine, radiator and thermostat replaced as previous engine overheated due to a radiator leak. It seems to be working fine now however the heat isn't coming on when the engine ...
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  • 2,714
3 votes
1 answer
56k views

How often to start/drive a vehicle to keep it healthy?

In order to keep a gasoline-powered vehicle healthy, how often does it need to be started or driven? Please specify if it actually needs to be driven, or if just starting it and letting it run is ...
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3 votes
2 answers
657 views

Ford F150 1999 4.6L anti freeze leaks from drain on engine wall

They say heater core, Ford dealer replaced it 3 years ago. Its leaking from the drain. I have luke warm air from vents. I was told to turn the temp knob from cold to hot a few times, I did and it ...
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3 votes
1 answer
274 views

2004 V8 LT Chevy Suburban No Heat at Idle

I have a 2004 Chevy Suburban that had no heat in the front or rear at idle. I found this mechanics stack exchange article, discovered I was low on coolant and now I have heat in the front when idle ...
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  • 31
3 votes
1 answer
585 views

Lower radiator hose heater. Is it worth it?

As winter and cold temperature are coming soon, I was looking at getting a block heater and I came across a thread talking about installing a lower radiator hose heater. Does anyone have one installed?...
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3 votes
2 answers
6k views

Why does air always blow out of the dash vents?

This is something that occurs on every vehicle I've driven in the last 15 years, so it's obviously not a malfunction but a design choice. When you turn the selector to blow either on the floor or ...
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  • 294
3 votes
1 answer
246 views

Inspecting and reparing third generation (1996-2000) Dodge Caravan heater mode door

How can I inspect or repair the Dodge Caravan heater "mode door"? How much must be removed beyond the glove box? The mode door directs air to defrost or the heater vents, and it is controlled by an ...
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  • 397