Passat (B5) :: 1998 - Heat Doesn't Work / Blows Cold Air
Dec 1, 2007
My g/f's 98 Passat 1.8T has been pretty bad on being able to blow hot air inside, and now that its colder out its even worse.
Ever since she got the car, the coolant temp gauge is always at it's coldest, so I'm thinking its time for a greentop sensor. Her coolant right now is a lil low so, in the meantime, I'll be headed to the dealer to get both a new CTS and some G12.
Her fan does blow air, but could there be anything else wrong that would keep it from blowing hot air?
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I've got this 1998 Monte Carlo with 191K on the odometer. Last year, when it got cold out, the washer pump did not work. But when it warmed up, it worked. This last summer, I replaced it with a new one. I clean out the squirters and verified that it all worked beautifully and was ready for the cold again. Well, it worked a couple of weeks ago, but now that it has gotten cold, it does not work. And the real weird thing is that when you are trying to get the washer to work, the wipers are going, right? Well, when you engage the washer, the wipers slow down, like there is a tremendous load on the circuit, but there is no sound from the washer pump.
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I was 4 hours into a 6 hour trip (on the way home) and my air stopped working! when i press the AC button, it lights up on settings 1,2, and 3 but NOTHING blows from the vents (whether the AC button is pressed or not, nothing comes out!) however... when I turn it to "4," air blows full blast but the AC light turns off and only blows warm air.
thinking I need to check my compressor!
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Just picked up an 87 150 and have found the following few problems. (Chilton no longer has a "troubleshooting" section...taking that POS back). Anyway here we go... No heat. AC blows cold, but there's no heat. Possible problems and fixes?
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I'm having with my truck. During a drive cross country my heat started to go from hot to mildly warm to cold in probably 5 hours. After stopping I checked my coolant level and it was empty. I do have a leaky head gasket and have driven about 18 hours so I'm guessing that's where it went. I could not find a leak anywhere. I filled it back up and left the cap off the reservoir to let any air work it's way out. My heat still blows cold as ice but if I shut off the heat completely and wait ten seconds then turn it back on it will blow warm air for maybe two seconds. What this could be?
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On occasion the heat on my mk6 golf will start to blow cold when turned to the max click. Turning it back one click will cause it to start to blow hot again.
Friend at the dealer said he thought there was a software update for the hvac controls ....
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My daughter has complained about periods of no heat- fan blows but cold air. Next time the heater works fine. She is keeping coolant level up but does need to add a bit (pint or so) say every other month. Last week during the Chicago snow storm she called and told me the heater (which had been working) blew a bunch of "smoke" into the car and onto the windshield and windows which then froze solid. I assume the smoke meant steam and she did say it had a sweet smell when I asked her.
Car was towed to a SAAB dealer who ran the car for a couple hours and found no issue and then drove the car for a period with no issue. I had my local mechanic also check it in the past for no heat and it also worked fine then. Only thing I can think of is that there might be a small/intermittent leak in the head gasket with an exhaust bubble forced into the cooling system? That does not explain the steam in the passenger compartment though. Could it?
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I have a 00 Ford Excursion and only heat blows out of the front vents, the temp control doesn't work at all! The back has it's own controls and will come out cold (not a/c just the outside air) when the front is on (blasting heat). What this could be?
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I have no heat in the LS at no settings. The AC runs good but does not seem to be regulated as it blows cold at any temp setting. The fan responds to settings but i still get no heat even with the AC turned off. I would like to find a diagram that shows the locations of the bleed valves to start a coolant air bleed.
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Heat blows warm at best and A/C isn't all that cold. I want to believe its a blend door issue and dive into it this weekend and fix it but there isn't a single piece of foam coming out of any of the vents. Of all the systems on the car, HVAC isn't my cup of tea I don't know anything about it. What else could be the problem? I can live without A/C but the heat things must be fixed.
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At 145k my radiator seems to be leaking. Eventually I'll be at the point where heat blows ice cold. Where should I get a radiator?
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There used to be a audible pop in my stereo speaker when my heat would kick on. Now there is not. My heat did this last winter around the same time. I checked Fuses. The blower blows, but it just blows cold air. It could be a thermostat, or a clogged heater core. 1997 Ford Ranger 2.3L ...
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Bought new oct.2012. Fiirst time used heat blows cold from one side hot from other. not consistent, will vary from left cold, then hot from right or the opposite. been fighting with chrysler from then till now. engineers know problem exists and are working on a fix. haven't found it yet. contacted chrysler numerous times, just get passed from one to another.
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I have a 2002 Dodge Durango and the rear passenger air blows cold only - was fine last winter. Neither the passenger or the driver controls will get warm air to the rear via the overhead vents. Warm air comes out under the front seats to the rear only.
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Turn signal flasher doesn't work in the heat. What gives?
All lights work. Turn signal stalk works fine. It just flashes a couple of times, then stays on. Everything works fine in cool weather, but it rarely works at all when the temperature outside is above 90 degrees. Very annoyed.
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My brother-in-law has a 97 F-150 with 4.6L that has no heat in the cab (blows cold air no matter what setting at HVAC controller). Heater core was replaced one year ago and T-stat was replaced last night. Coolant level is full and the heater hoses are BOTH hot so I believe warm coolant is flowing through the heater core. I am thinking that the HVAC controller may be at fault or maybe the mixing door in the HVAC plenum is malfunctioning. I have 97 rangers that had a broken hinge pin for the mixing door inside the plenum (a common problem with these trucks), maybe this is the same issue (I don't know). I am taking the whole dash out to see what the trouble is.
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My 2009 silverado ltz is haveing heating issues. when you first start truck all work fine. After a couple min the drivers side vents loose heat and blows cold air. the heat on the pass side works fine. then the vent will change to defrost even though the display still shows its on vent. the only way to get it back is to mess with the vent control. then it will last about a min then back to defrost. at this point i just turn it off. I have already replaced the control panel to no avail ...
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1998 F150 step side, 4.6 V-8 automatic, 176,000 miles -
Heater begins to blow heat as the engine warms up - heat gauge moves up to normal level - running at speed, suddenly the heater blows all cold, the heat gauge pegs to total hot - the oil light comes on, the engine begins to miss - stop the truck, shut off the motor, wait 10 seconds, start back up and all is normal and away I go. Heater working just fine. Gauges are just fine. Have checked the hoses when it pegged to hot, and they are just warm just as if everything is normal.
Problem is intermittent.
Have changed radiator reservoir cap, thermostat, made sure fluid level and mixture is correct - what else to check? Computer issue?
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My son's 98 Expedition has no heat. The radiator and overflow tank are full, there's no air in the system. The radiator hoses get nice and hot but the heater hoses stay cold. We can hear the flow through the vents change when we change the temp control so I'm sure the blend door works fine. Seems like the problem is that no hot coolant is making it to the heater core. So I'm wondering if there is a diverter valve somewhere that could be bad that's keeping the hot coolant away from the HC or if a clogged HC is the only thing that could cause this.
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98 ford Ranger 2.5L.
I have not heat from the vents, doesn't get warm at all. If I idle the enginer in 30 Degree weather it gets to almost the C.
Upper Radiator hose is hot, I have verified the thermostat is new and it opens at 192 degrees as it should. Replaced the Water Pump, Fan spins freely.
I have attempted to burp the system, it isn't kicking out anymore air from the lines that I can tell. I used a large funnel and filled it with Anti-freeze, it filled the radiator, burped the system and the reservoir filled to overflowing. All with the engine hot. (To be specific the funnel was always full of fluid so no air could get sucked backwards)
The heater core hose on the left when looking from the front of the vehicle does not get hot, the one on the right gets warm. I theorize that the heater core is clogged up somehow and that is why that left line doesn't get hot. There is no fluid in the cab of the truck from the core.
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Here's an odd one. On our mildly cold winter mornings ~12 degC the radio on button doesn't work. This is regardless of the power status the night prior. What's even weirder if that if climate control is off and you turn it on the radio button is fixed. Earth leak, cold temp resistance, 12V battery?
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