I have a 2004 gmc sierra and it is having heater issues. For a while now when starting it up cold it would not blow any warm air until the vehicle is moving. The other day while driving it would go back and forth between hot and cold.
View 3 RepliesHaving issues with the AC system turning on to blow cold air? The problem seems to be intermittent so I don't know how I would be able to replicate the problem if/when I take the car in for service. My problem typically occurs when I start the vehicle. The AC will be on but will blow warm air. I seem to have to continually play with the HVAC controls for it to finally kick on and blow cold air.
When I searched, I read that the malfunction may be caused by a bad solder in the system but wasn't able to find a concrete resolution to the problem. Should I call a few dealerships to see if the service writers are aware of the issue? Being in AZ, not having AC for the first 5-10 minutes in the car can be brutal. The car in question is a 2014 3.6 SEL ...
I am having a problem with the heater on my 98 2.7 Intrepid. Will not blow hot air when idling (just warm). After several minutes of driving with heat on air temp goes from hot to warm. It might just be me, but it seems like the air flow is cooler coming out of the defrost vents than from the dash/floor vents. Thermostat has been replaced (proper operation verified before installing). Had to replace gooseneck and heater coil supply tubing due to a leaking bleed valve. There appears to be NO air in the system.
Heater core was backflushed, there appears to be no restriction. Hose temp on exit line is approx. 15 deg. cooler than supply line when fan is running. Blend door actuator was replaced last spring (motor shorted). When temp control is moved from hot to cold temp changes drastically and door can be heard moving. On-board ATC diagnostics indicate all is good. Engine is running at normal operating temperature, not overheating or running cold. Is there a cabin filter or inlet supply for the air that could possibly be obstructed? Air flow seems adequate, not restricted. AC works fine.
I have a 2000 suburban with a 1500 motor and 300000 miles. Last year I replace the water pump and the thermostat. The heater would blow warm but not hot . But only when I start to drive. Yesterday I decide to change thermostat again thinking the new one from last year was faulty. Now the heater only blows cold air .
View 3 RepliesMy heater quit blowing hot or warm air all of the sudden. I took my mechanic and they said it showed no codes and were afraid to mess with it so I took it to a dealership. They worked on it most of a day. Said nothing showed a code as bad, they got into it and found the air going into the heater core was hot, but it was cool coming out. They spent some time flushing the coolant and said they found some sediment in the coolant fluid. They were hoping to flush out anything clogging the heater core.
View 8 RepliesI just replaced the radiator in my 2001 Elantra and now the heater will not blow warm air. Also the temp gauge on the dash stays at cold.
I have replaced all radiator hoses ...
New thermostat
New thermostat sensor
It blows luke warm air, no hot or no AC just luke warm... what could it be?
View 1 RepliesSunday I bought a 2001 f250/5.4 to replace my 91 f250. I didnt drive it yesterday, but this morning on my drive to work the heater was very weak, it seemed to blow warm for the most part, but was barely pushing air even on high. I flipped it over to A/C to see if it blew any harder and it did. Does the blower motor need replace? if so why does the AC blow harder than the heater?
View 14 RepliesI can't seem to get the engine temp to middle range on the marker, but yet my heater blows "to me" hot air. Even while sitting in idle for extended amounts of time I cannot get it to "operating" temperature. I would think if my thermostat was stuck open my heater would blow either cold or slightly warm air. I have the 5.4L engine with knn air filter and no cats.
View 14 RepliesI have a 94 ford Taurus all of a sudden my ac doesn't blow cold and my heat doesn't blow hot. Also every now and again I hear a sound like an alarm clock coming from passenger side??
View 3 RepliesWhen it's cold I can floor it and it'll go to 4K RPM.....When it warms up the oil pressure drops and then I can't push the motor over 1500 RPM. I overhauled it and used the old camshaft....I really don't want to get charged 80 bucks an hour for a mechanic to take 2 days to tell me it something I could have fixed myself.
1999 GMC Sierra 4.3 V6 "W"
I recenty replaced the upper intake manifold gasket on my gmc sierra 1500 350 motor. In the process I did plugs and wires and power steering pump. I went through everything and cleaned it to perfection and put it together. It started like a dream and took it for a test burn out in the country. About 15 miles down the road I shut it down and went through all the fluids and upon starting I noticed it was really hard starting. Kinda like it had alot of compression. I just replaced the battery 2 month ago with the best Interstate battery they had and it still checks out good.
Every time I went to start it cold it started normal but when warm it had the same hard starting issue. Well a week later I stopped at the store before work and it did the same but then just rested to a stop and now the starter just clicks every time I turn the key. I can turn the motor over by hand with a wrench and all battery connection are good. I just put a new starter in today thinking that may have been a fluke of a deal but nothing still. I did see when I first tried the new starter that the pulley on the alternator was trying to spin over ever so slowly tell it quit again.
My 1989 GMC k1500 step side makes a buzzing noise when i run the heater, when i turn it up the noise gets louder, whats causing this and how do i fix it?
View 6 RepliesI've noticed that if I press the EV button when stopped at a stop sign or red light, I can get the vehicle moving up to 25 MPH with the battery. This must save fuel. But I wonder if I am doing something that causes problems with the battery, motor, or other systems.
View 19 RepliesI've only had the car about a month, and love everything about it. . . . but with the onset of cold mornings, I'm not very excited about the luke-warm air coming out of my heater.
It's reminding me of my old B5.5 Passat VR6 wagon and the annual heater-core flush that it required. Of course, the Passat was 13 years old and had 200k on it.
2001 Ford Escape.
Blend door seems to be moving properly...(or at least the control arm is...) Truck gets up to operating temperature quickly enough.
It does blow warm air, but never gets hot...can't keep up with single digit temps. Every thing looks to be operating properly...
My grandson keep his 93 GMC K1500 w/5.7L auto running till he gets out of college. The problem is the engine stalls (sometimes) when put into gear (D or R) and more often when the lights and heater blower are turned on. There were two codes in the pcm (42 & 43) both referring to ignition problems. We did a tune up and erased the codes. After driving the truck for a week the pcm has no codes but the engine still stalls. We cleaned the IAC pintel and seat thinking there might be an air control problem, no luck. The repair manual mentioned ignition advance as a problem particularly the ESC. The manual says this part is on the side of the throttle body but we can not find it.
View 11 Replies2000 f150 heater only got warm.
Flushed system, new thermostat, new coolant. Then NO warm air. A/C blows cold. Checked heater blend door and actuator both intact and working. Heater core not leaking, system holds pressure and doesn't leak.
Is there another automatic valve that could be shutting off flow to heater core?????
Ever since I got my 2010 Prius (about a week ago) I always get a little scare whenever I'm backing out of a parking place. The Prius seems to think that the ideal time to start the ICE to warm it up is when I'm moving backwards and halfway out of the spot... which, of course, causes a little vibration in the car and makes me think I hit or ran over something. It really scared me the first time... especially since I had only had the car a few hours then and I'm mostly used to it by now, but every now and then it catches me off guard.
View 19 RepliesI have a 2010 Grand Caravan, and the engine just stops while moving down the road. Once you shift to neutral, the engine starts again easily. The only common thing we've found is that the skid control light goes on. It doesn't seem to happen when going more than 30 mph, and does seem to happen more when the temps outside are changing, but both when we get a warm spell or a cold snap. The recall work on the key assembly has been done, and the key always seem to be in the on position, so it's not that known issue. The local garage couldn't find anything or even replicate the problem. The dealership replaced the spark plugs and did a fuel system cleaning. Those were probably due, but they didn't seem to work much.
View 5 Replies2005 Elantra here with 120k miles
Problem: Not heat will come out unless
1) I don't turn on the Fan Motor at all. Very Nice heat will "bleed" out of the vents as long as there is no Fan on - on any setting.
2) Lukewarm heat will come out if I am giving the car gas or revving it. As soon as it goes back to idle or I am no longer giving gas it goes back to no heat at all.
Things I have tried:
Topped up the radiator and tank (radiator has been replaced)
Water pump replaced
No leaks
Thermostat is opening ( Upper hose gets hot, Lower hose stays cold for a while and then gets hot)
Flushed heater core with a garden hose.
Inlet hose to heater core is hotter than outlet hose but outlet hose is not cold to the touch.
Radiator cap has been replaced
Car does not run hot at all