My heater will blow hot when the fan speed is set to the lower two speeds but when I put the fan on the higher speeds the heat starts to turn cold almost right away, but when I put it back to low it gets hot again. It doesn't matter whether the button for the recirculate mode is on or off, defrost or whatever. WWhat is the cause of this?This is on a 2005 Chevrolet Silverado 2500 HD truck.
View 1 RepliesChecked but could find much on the throttle body. I have a 93 Chev 1500 2wd 5.7 320000km when I drive on highway, it drives along good when I get to slower speeds is seems to studder. I have to push gas pedal to push it threw. I bought some throttle body cleaner and I noticed that when I sprayed around the bottom of throttle body. It almost stalls. Could this be the reason why I am getting the studder and is that the indication that I should replace the base of throttle body gasket ? I replaced the plugs and fuel filter cleaned iac motor ....
View 5 RepliesI have a 2006 f250 and the heater will blow cold air unless you are driving in like highway conditions. If you stop or drive slow it blows cold air only. What is causing this???
View 3 RepliesI am sure some of us have heard and read the no oil pressure situation. i had it happen to me and I replaced the oil pump and pick up tube all new oe gaskets with the replacement. i still have the same problem. No oil pressure and the tick sound.
View 3 RepliesI am getting a light clicking from my rear Axel when coasting at a slow speed. It could be clicking at any speed but my car is to loud to hear it going down the road. I don't have more details than this. What to look for ?
View 15 RepliesMy blower motor does not blow hard on high. 2009 AVALON.
View 3 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 RepliesI'm at the end of my rope! My 2005 Ford Five Hundred Limited has a constant problem with the A/C system and overheating. In the last year I've replaced the compress, expansion valve, dryer FOUR times. They have replaced the condenser, blower motor, and added Freon, and checked for leaks. It will blow cold when running fast and then blow hot. They have replaced belts pulleys, They have replaced the thermostat, fans, coolant reservoir, hoses. and it still overheats. I've taken it to 4 difference mechanics including two dealerships. No one can seem to fix this problem.
View 9 RepliesI have a 2005 Malibu. After two alignments, a front wheel alignment by an independent shop and a "four wheel" alignment by the dealer, my car still pulls to the left at highway speeds. What else could be the cause of this? Bought the car with 22,000 miles and now have 80,000 plus. No accidents; don't understand what is wrong.
View 4 RepliesA friend just had a transmission line pull out of his radiator and blow fluid all over everything.
How do these lines work? Are the kind of like the fuel lines that just plug in and are held in my a retainer clip?
Does the whole radiator have to be changed to fix it or can the "fitting" be turned out of the radiator and replaced?
Looking at the line that is still in the radiator, the fitting looks like a large hex nut at the radiator with a thick rubber washer on the outside.
I'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.
2000 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?????
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 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
I 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
I have a 97 E-150 with factory air (vin L) the heat/cool quit working just before summer it quit blowing cold. The old man took it to some mechanic (i hate when he does that) and he fixed it so there was air only saying he had a choice of cold or hot (being summer in the desert he chose cold). Now that it is cold and we are traveling where defrost is needed, I need heat!!! I went to the Ford dealer and picked up a new potentiometer and that did not fix the problem. whenever the unit is on the a/c compressor kicks on........ Is this electrical or vacuum and where might i find the problem?
View 8 RepliesI 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 RepliesI have a 2013 Prius 4. I'm not sure if there is a problem or not but the heater just seems to blow the same temperature of air no matter how high I set the temperature. The air feels lukewarm. I was driving 60 miles yesterday with the temperature set at 76. I had on a long sleeve shirt and polar fleece jacket and it never got to where I was really warm. Outside temp was about 50.
View 10 RepliesI have owned my 2008 Rx 400 h for just over two months now and at the risk of sounding dense, am I right in assuming that when you are coasting along without the engine running, the heater will start to blow cold air? Everything works fine until you lift your foot off the pedal. This is my first Lexus/Toyota and hybrid so I'm not totally au fait with how it should be working.
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