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You smell coolant inside your car. Your windows are fogged up. You notice coolant leaking under your dashboard. Your engine is running hot. Your coolant level is dropping. 3. Broken Heater Controls. It’s possible that the issue is your control buttons. Over time they can get worn out or break and stop working.Heater blows cold to start with then starts blowing hot at the same time the hoses going to heater core are getting hot when blowing hot and cold when blowing cold. Have put new thermostat, heater core and water pump, still doing the same thing.Car Heater Blowing Cold Air Cost To Fix. It’s difficult to accurately say the repair cost of a car heater blowing cold air because several factors can be the culprit. However, the repair cost can be as little as $10 or as high as $1000 or even more. A low coolant level is one of the common root causes and the easiest and cheapest to fix.Stuck Thermostat. If the thermostat is stuck open, the engine temperature will drop below normal, especially in cold weather. In this case, the check engine light should be on and a P0128 code activated. When the car is cool, lift the hood and check the hoses for blockages. Otherwise, the valves in the thermostat hoses may be stuck open.If it blows hot then the temp will go back to normal and the rest of the trip it will operate as normal. If it blows cold I will turn the heater off and on until it blows hot and the temp gauge goes back to normal. I can't tell if there is a funny smell or if I'm imaging it. Nothing leaking in the floor board and nothing blowing on the windshield.After driving the vehicle some distance, say 10 or 15 minutes, the water should be up to temperature. Turn on the heater to the hottest setting. Grab both of the hoses, 1 should be hotter than the other. The hotter hose is …Aug 24, 2016 · 2015 GMC Canyon SLE Crew Cab, V6, 2WD, Long Box, Cyber Gray Metallic, w/ All Terrain Package, Bose, and Navigation . Look at the bright side man. It's hot in Texas during the summer, and your vehicle is stuck blowing cold air. If could be doing the opposite, then you'd REALLY be hating life.F250 AC Cycling cold / Hot. I have a 2003 F250 King Ranch with a 6.0 turbo diesel. When the engine is started in the morning, the AC blows cold but when the vehicle heats up or is driven for a while, it will all of a sudden start to blow hot. I have replaced the high pressure switch (I think that's the one) towards the top of the compreeor but ...sounds like heater control valve situated under scullle panel common fault on ka set heater fan switch half way between hot and cold with heater blowing then touch valve if pulsing or clicking noise it is faulty if doesnt solve problem faulty switch Read full answer. Jun 07, ...Heater blows cold to start with then starts blowing hot at the same time the hoses going to heater core are getting hot when blowing hot and cold when blowing cold. Have put new thermostat, heater core and water pump, still doing the same thing.2001 CHEVROLET TAHOE. 5.3L. V8. 2WD. AUTOMATIC. 186,500 MILES. Hello all, Our heater blows hot for about fifteen to thirty seconds when first turned on and then goes lukewarm to cold. The heater works almost always when all controls are off with the temperature set to max hot with the outside air coming in (this is not a dual temperature …Check the damper and see if it is moving. For a 4 second change it got to be blending of hot and cold air. A heater core cannot change temperature that quickly. 1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package. 2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.Low Coolant. Low coolant level is the most common cause of poor heater output. To determine if this is the problem, when the engine is cool, remove the radiator cap. The coolant level should be at the top of the radiator neck. Using a 50/50 mix of anti-freeze and distilled water, top off the radiator and fill the coolant reservoir tank to the ...Check the damper and see if it is moving. For a 4 second change it got to be blending of hot and cold air. A heater core cannot change temperature that quickly. 1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package. 2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.22017 posts · Joined 2009. #4 · Feb 17, 2021. If the blend doors are working properly, there are no other air blockages, and both heater hoses are hot, then you likely have a partially plugged core. There is enough coolant flow to warm the hoses but its only going through a small part of the core and not transferring much heat to the air.My 08 dodge ram heater only blows hot on passenger side. Driver side blows cold. I replaced the blend door above the blower motor (as previous owner had ripped it out) . Actuator for it also works. I recently also replaced the thermostat. Driver side still blows cool but passenger side is hot...Heater blows cold air unless accelerating. Even when the car is warm the heat blows cold when sitting idle. Found a leak at lower radiator hose and radiator tank. Have not yet ruled out an additional leak at the front intake manifold area or head gasket. loss of coolant creates a "gap", or air in the entire system and it has to "catch up" (draw ...

The 2014 Chevrolet Camaro has 2 problems reported for blows warm air, then cold, back to warm. Average failure mileage is 95,750 miles.Hey guys, Recently noticed in my wifes 99 5.4 eddie bauer expedition that when the heat is on it blows ice cold air and then after 30 minutes or so it is room temperature air. It never gets hot or even close to warm. Any ideas where to start checking on this? Ive never messed around with...Had been driving for about 20 minutes when the temperature gauge dropped from "normal" to "C" and the heater was blowing cool instead of hot. Pulled to the side of the road and sat there for 45 minutes (outside temp about 2F). Removed radiator cap and it was full. Drove 3 miles to the dealer, they checked it out and couldn't find anything.Inspect the Filter. An oil furnace has a special filter that prevents contaminants from getting into the heating system and causing problems. If this filter gets clogged, it can starve your furnace of its fuel source. Fortunately, replacing the filter is an easy and inexpensive fix. Performing regular filter changes will prevent clogs in the ...Check coolant level, possible reasons for yours is water pump impeller is broke, thermostat, blocked heater core, head gaskets. 6.0L Power Stroke Diesel - 05 6.0 heater blowing cold air - My 05 is blowing cold air out of heater after it is warmed up. At an idle it blows hot but after you drive a few minutes it blows cold.

2007 Ram 5.7 110,000 mi. A/C is cold while driving but when I stop at light, it blows hot. New radiator, a/c hose, recharged. Possible problem/solution? May be related, during cold weather, only defrost works, heater blows cold. Thanks in advance for any input.I turn the A/C on - I get super cold air from both passenger's vents (side and center), but normal/outside temp. air from both driver's vents. While A/C is on I turn the temp. dial to heat - all four vents blow hot air. Back to cold - same situation as above (passenger - cold; driver - normal air). This happens in both A/C and MAX A/C.Aug 12, 2022 · If you own a 6.7 Cummins and your heater is blowing cold air, there are a few things that could be the culprit. First, check to see if the engine coolant level is low. If it is, add more coolant until it reaches the full line on the reservoir. Next, check the thermostat to see if it’s stuck in the closed position.…

Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. Turn the power back on and test the heater. . Possible cause: I am having a similar problem right now...at crusing speeds my heater blo.