Just bought a 04' F250, new head studs and gaskets. Put a tranny temp sensor in and replaced bad thermostat. My coolant res is full and temp is bout 185 (it's 10* outside). My heater is blowing out cold air, I'm assuming there's air in the system.
View 2 RepliesI have a 2004 GX470. Now that the weather has dropped I have noticed that my heater is taking a long time to warm up all it does is blow cold air out of the vent. Subsequently I have started to notice that they car will start to overheat. It will never get to the point where it will hit the red but it will go up and then come back down to mid range. There doesn't seem to be anything else wrong with the car, it idles fine, starts fine etc. Could these two issues be related?
View 14 RepliesHeater is blowing cold air. What I have checked, coolant level, replaced water pump and thermostat, checked blend door, flushed heater core. When I checked the blend door via the heater treator method I was getting hot air coming off the core but also getting very cold air coming from the A/C evap in side the plenom box. I also pulled the fuse for the A/C clutch and I am still getting cold air. I am look at replacing the HVAC contol.
View 9 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 RepliesHere's what I have. 02 X 7.3L 4x4.
Heater will work fine. Then out of nowhere just blow cold. I can turn it off then back on it'll blow hot for 1 minute or 20 minutes. Then out of nowhere blow cold again. It doesn't matter if I'm highway driving or city driving.
I'm kinda thinking it may be the door in the duct that's just closing. I real don't know.
This problem is on my son's 2000 F-250 5.4. It's into October and my son tells me he has no heat coming out of his vents. I figure it has to be the control valve that should be in the heater hose lines. Could be jammed closed or a vacuum line has come off the pot that controls the open close cycle. We open the hood and nowhere can we see a coolant control flow valve. It is so tight and dark under all that mess of wires, intake, air conditioner lines and whatever.
Just where should we be looking for the valve. Also it could be the vacuum line is unplugged on the dash, behind the warm/cool selector. And even there is a possibility that some doofus has removed something. He bought the truck this summer. So to get us on the right path, where we start looking for the flow control valve?
2001 F250 5.4. The heater will blow warm air at idle and on the second highest setting, once you start moving or turn the fan up to full blast it instantly cools off. The coolant level is fine. The engine runs at a normal temp.The blend door does work. I just replaced the thermostat, and both hoses for the heater core are hot.
View 4 RepliesGot a bit of a problem with my car. Earlier this week, I got in and noticed there was heavy condensation on the inside of the windshield of my 2002 Chrysler Sebring convertible. The windows had been rolled up and the top up of course. I see this kind of condensation happen on the outside a lot in the mornings. You know, dew settling and all that. If I wait around until later in the day, it evaporates on its own.
Anyway, this time it was on the INSIDE. I wiped it clean easily enough and was on my way.
Today I noticed that my heater wasn't working. The temperature gauge goes up to about 1/3 of the way, so I know the car is warming up. I'm not sure if it normally goes up that high; I don't usually pay much attention to the temperature gauge.
Truck has heat when driving but when stopped blows cold air. Replaced thermostat. still blows cold when stopped.
View 5 RepliesWinter is coming and I am running into a problem, I tried to set my heat at the highest level today and was getting nothing but cold air. I get ice cold A/C, but no heat at any temperature. What could be the culprit?
View 9 RepliesMy '01 Super Duty 5.4 has an overheating/heater problem that the dealer can't seem to fix. I noticed my heater was blowing cold then a few miles later it overheated pushing coolant out of cap. Next day drove fine to Ford dealer who replaced my heater core, thermostat, reservoir cap and a hose. Drove it for a day till the exact original symptoms occurred again with a gurgling sound in dash. Dealer kept for a week pressurizing system but no leaks found. Replaced my thermostat again and gave it back. I drove it 300 miles over a week before the exact same symptoms occurred. Brought back to dealer who said that air was in the system, added a bunch of coolant and supposedly got all the air out. Same symptoms still. Brought back to dealer that finally changed the water pump they said had a leak. Guess what, same symptoms. Heater will work fine for days then it will blow cold, then hot, then cold and sooner or later truck will overheat then just as fast cool down and heater will work again. Still hearing gurgling. Dealer said I don't have a HCV.
View 6 RepliesI have a 1988 Toyota Camry LE V6. And recently the heater just started blowing ice cold while on the hot setting.
View 1 RepliesI took my 2000 V6 Passat into the shop because my heater vents were blowing cold. They tested the system and told me the following:
The hoses leading to the heating core are warm, but no warm air is leaving the heater core, indicating that it's plugged up with corrosion. They testing the coolant fluid and found that the incorrect coolant had been put into the system and that the fluid was carrying an electrical charge that must be corroding the aluminum portions of the system. In addition, the engine temp sensor is kaput and never goes up.
They offered a garden hose flush the heating system for a few hundred bucks, but warned that it is only 50% successful. They recommend replacing the heating core.
Chrysler Town and Country. The engine warms up just fine regardless of my speed or throttle position, but the cabin heater has started blowing cold air when I back off or sit at idle. It may be relevant that we hear a lot of gurgling in the dash soon after starting the engine.
View 5 RepliesAfter changing my CD player, my heater blows out cold air (not icy cold but cold like you have put the thermostat on low heat) all the time but my temperature gauge is perfectly normal! Its right in between cold and hot.
View 3 Replies01 Jeep Grand Cherokee. I just changed the water pump and the thermostat on the Jeep but the last two days when I drove it to work, the heater was blowing cold air and the engine was getting hot, almost to the red. What do you think that I should look into about getting the problem fixed>?
View 6 RepliesMy 2011 F-250 just started having a weird heater problem. My truck heater gets up to temp just fine but after cruising down the highway for about 15 minutes or so it starts blowing out cool air. I can turn the controls to defrost and back again and it blows warm, not hot but warm then cool again. It just started a couple of days ago. Temp gauges show normal temp also.
View 8 RepliesMy dodge charger 3.5L 2007 model have heater problem, The heat blows out cold air.
View 18 Replies2007 GS 350 109,500 miles. My heater was blowing cold at idle and warm when driving so I took it to dealer. To my surprise, dealer says its a blown head gasket. No other symptoms. No white smoke, no smells, no warning lights on dash, and running fine. Just had VVT gear recall done last week.
Fortunately I have Lexus extended warranty good thru 125k miles and Feb 2014. I do my own maintenance (plugs, oil changes etc). Have records for all. But have not done coolant change (due at 100k).
A/c is fully charged. Could be blowing cold one second, and blowing hot humid air the next.
View 5 RepliesI had my entire A/C unit converted to R-134 on my 93 F-250. This was the entire system done at a FORD dealership. I've got about 1000KM on it, mostly this past winter. I noticed a few weeks ago when i turned the A/C on that the air seemed to be only blowing air, like vent. It was not air conditioned. I ran it for 15 min or so before suddenly there was a blast of really cold air and it held strong until i turned the truck off.
I cannot reproduce the results again, however. I can tell that the compressor kicks in like before, meaning it seems to be working mechanically fine. The temp outside has been at or just above freezing. Would this have any effect on the A/C? Should I park this is a heated parade or something to test it? What to test/check prior to bringing to the dealership?