Question about 1994 Suzuki Sidekick

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Cabin air fan will not turn on

Air conditioning fan will not turn on - only in highest setting,with warm engine and by pressing level up and holding it

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Sounds like a blower motor resistor that is malfunctioning. It will cause the fan motor to only turn on at one speed, and generally it will work on High only. Pretty comon on and older vehicle, and fairly inexpensive.

Posted on Dec 11, 2009

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Renew the switch

Posted on Dec 11, 2009

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1 Answer

Fan stays on ,wont let the Radiator get hot .so i m not getting any heat


Hi Fred.

I'm not totally sure I understand your question, but I'll take a shot. Are you saying that the engine fan stays on all the time for your car, keeping the radiator cool, and so you're not able to get any heat in the cabin air? Or possibly that the cabin fan is on all the time and you can't get any heat because it's keeping the radiator cool.

unless there is something very odd about your car (or you're living at the south pole), your engine coolant will be plenty warm within a few minutes of starting. If you are doubtful, drive the car for 5 to 10 minutes, stop, turn off the motor, pop the hood, and carefully move your hand close to the radiator. The blower fan helps transfer heat, but that's to move the coolant temp down probably into the 150-200F range.

if you're not getting any cabin heat, I'd have stronger suspicion about the heater core for your air system. In the majority of vehicles, there is a loop of coolant that comes off the back of the engine block, through the fire wall, and up to a U-Bend of pipe. When the heater is off, the coolant is just re-directed back to the engine. As you turn the knob or lever for cabin heat, it'll turn a switching valve to shunt the hot coolant into a heat exchanger/mini-radiator that the cabin air blows past. This system being a mini-radiator is why highways with long uphill grades will advise motorists to turn on their heater full heat, highest fan, when climbing in the summer. it's an additional way to keep the engine from overheating, even if it sucks for people in the vehicle.

Depending on the car, it can be either easy or really involved diagnosing or repairing the heat exchanger. if you go this route, you'll want to make sure that the coolant is circulated through the core thoroughly and that the coolant-system is de-bubbled.

Good Luck!
D

Nov 24, 2015 | Cars & Trucks

1 Answer

1999 Nissan quest my van takes 40 minutes to reach normal operating temperature IF I have the defrost on, this does not happen if I have heat only on


By "normal operating temperature", are you referring to the engine temp or the cabin temp? If cabin temp, the defrost selection also engages your air conditioning system which lowers the temperature and the humidity of the air blown through your heating ducts. Although, you should not have to wait 40 minutes for warm air to flow. Check your engine's coolant level to ensure that it's filled properly, and be certain that the temperature control selector is set to the warmest level possible. There are other possible malfunctions that could account for this condition, but we'll leave that alone for the present. Now, if you're talking about the engine's normal operating temperature, please disregard what I have said so far and reply back.

Oct 01, 2013 | 1999 Nissan Quest

3 Answers

Why does my heat blow warm air then it turns cold


its VERY likely that your heater core is getting stopped up.

The heater in your car works by circulating hot water from the engine into a copper or aluminum pipe coiled up in the dashboard. The heater/airconditioner's fan blows across it and the hot air comes out of the vents. This is why the heater doesn't work right away when you first start the car. It usually won't work until the hot/cold needle in the gauges is starting to rise up.

If your mechanic recently replaced the thermostat, its possible that there is air in the system which will result in less antifreeze in the car than it should be. If this is not the case, the heater core is probably stopping up and will require expensive replacement if it cannot be flushed clean.

Check to make sure the car is full of antifreeze IN THE RADIATOR, AND THE OVERFLOW JUG. Please be very sure there is NO AIR in the cooling system as well.

Scott

Jan 22, 2013 | 1998 Ford Expedition

1 Answer

How do I know if my heater core is bad? 2007 Dodge Caliber


You can do a system pressure test, if it does not leak down pressure, there is no leak. If you do not get a puddle of coolant where the water flows out from the air conditioning drain, it is not likely leaking.

If you have no heat, it likely has an air bubble that needs to be purged. When engine is warm, one heater hose will be hot, the other will be just alittle warm.

To purge an air bubble Install a flushing tee in the upper most hose from jheater core- which is the also the hose that usually is attached on the engine at the highest point.

When engine is cold; Make sure the pressure cap is off, and system is full, put the pressure cap back on tight. Put the flushing tee cap on snug- start the engine, and let it warm up. As it warms up hold the flushing tee as high as you can, and carefully crack open the cap so you can hear air escape and some coolant will dribble out. You essentially want to keep that upen until the air has purged and nothing but a steady stream of coolant is flowing. Tighten the cap.

If you are still not getting heat in the cabin, or if both heater hoses are hot, check to make sure the blender door is not disconnected and the control cable housing is anchored on both ends.

Mar 30, 2012 | 2007 Dodge Caliber SXT Sport Hatchback

1 Answer

Hi just wonder why my 2000 cavilier would still blow hot air when the heater is shut off


The vehicle is probably engineered that way, years back GM introduced what they called Astro ventillation tyo the Chevette line of vehicles, I had just started working for a dealership that was going to be slandered all over the news because they couldn't repair the vehicle from blowing warm air even though the fan and heater slide were turned off.
This was my first job in the dealer after the problem went around the shop for a month or two, I found an article paragraph on the first page of our in house reair manual for heater and air condition trouble shooting Chevrolet Chevette, it stated that the car with the key on whether running or not would keep a constant flow of air throughout its outer body skins called an Astro Ventillation system and its purpose was to keep any toxic and/or flammable gas fumes out of the vehicles cabin space.
It was around for a long time and probablyl is the reason why you have this same condition of warm air flow, its a constant turning of the heater blower fan.
Happy Motoring!!!

Jun 07, 2010 | 2000 Chevrolet Cavalier

1 Answer

Cabin Heat is Intermittent / Fluctuates / Cycles


You may have air trapped in the lines to or from the heater core.
If you (still) have a real radiator cap on the radiator, remove it with a cold engine, start and run the engine allowing it to warm up while watching the water/coolant level. Make sure the heater control is set to its highest heat setting while doing this. If it is trapped air, you may see it 'belch' after the engine is warm and the engine thermostat is open. Refill as needed if this is the case.
It's more difficult without direct radiator access and may require several cycles of hot/cold to allow refilling through the overflow.

Dec 10, 2009 | 2002 Dodge Grand Caravan

1 Answer

2001 Ranger XLT heat and air conditioning only work on high speed


there is a flapor motor that is controled by vacume, check for leaks in the vacume lines on the engine.

Sep 30, 2009 | 2000 Ford Ranger SuperCab

1 Answer

2000 chevy lumina. Is fan supposed to come on when car started


no fan comes on when engine cold start up .but it will come on when you turn on air conditioning or defrost on .if engine idling a while when temp get 190 degree the fan will kick on.if over heating you got air in system .wait until cools check coolant add more .crank engine let it idle few. minutes when start warming up turn off engine wait a while before removing radiator cap so you wont get scald.add more coolant .crank it again starting warming up turn off engine wait a while .add coolant .keep doing this procedure until your coolant stop dropping off .if you do this more than 6 times you got a leak some where.check crank level for signs.if oil level higher than normal.if everything looking good.when engine cool make sure add coolant to over flow jug cold level mark.

Apr 28, 2009 | 1999 Chevrolet Lumina

3 Answers

Car just blows out cold air from heater


there is something wrong with your coolant system. Turn your car on, check your fan. If the fan runs nonstop, your relay switch to the fan needs to be changed. If its not the fan, its the thermostat. The thermostat is broke. If the thermostat is broke, it prevents your vehicle from warming up. The thermostat is a temperature Regulator for the engine. If your antifreeze is running nonstop in a circular motion, your engine will run cold. Your engine wont start that cold in the winter either.

Dec 03, 2008 | 1995 Honda Accord

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