Question about 1993 Volvo 850

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Volvo 850 1993 cna not heat

When put the heat on only cool air

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  • tanagah Dec 04, 2008

    i change the thermosatat and coolant but still no heat

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Check the water level in radiator. If full, the next step would be the thermostat, usually located on the top of engine under a mount that is connected to a ruuber hose that comes from radiator. It also could be the "slide" lever itself is not connected. these are the most common and simplest approaches.

Posted on Dec 03, 2008

  • mezmoreyes Dec 05, 2008

    Go back to the lever on the heating mechanism, see if it is connected properly. If Not that, then I hate to say that you may need a head gasket, but that would show water loss or overheating.

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I put a thermostat in my 95 Volvo 3 years ago because it was over heating and everything was fine, now it is over heating again.Why would a thermostat go bad in 2 years.


It depends on the quality of the part installed, cheap does not last long. Next you want to blow out the Radiator and Inter-Cooler to make sure you have good air flow to cool it.

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How do I bleed the radiator in my C70 Volvo ? you can bleed a radiator in a C70 , rite ?..


  1. This method works best if the nose of the car is raised as high as possible. Park your car in your driveway. Let your car cool down. When your car is cooled down, you are ready to work on the cooling system.
  2. Open the hood of your car. Secure the hood with the safety handle. If you have a newer car, you should have a bleeder valve on the front of your radiator. Check in your owner's manual for the location of this valve. If you do start your car, open the valve with wrench and let your car heat up. The excess air will bleed out of your cooling system. Keep your car on long enough to give the (trapped air) time to bleed out of your system.
  3. Let your car cool down. Once the car is cool, take off the radiator cap. Did the level of the radiator fluid go down? If it did, it means you bled the air out of your cooling system. Replace the radiator fluid, turn on the car, and let it run. Replace radiator fluid as needed.
  4. Step 3 (above) is the way you will remove air from your cooling system if you do not have a bleeder valve on your radiator. You will leave the cap off the radiator. You will run your car until it heats up. As the air dissipates, the radiator fluid level will go down. You will fill up your radiator fluid to the correct level. Be careful because the heated radiator fluid will be hot. Always wear leather gloves and safety goggles when working on your radiator.
  5. Once the air dissipates and you fill the fluid, shut off the car. Let the car cool down. Once the car is cool, put the radiator cap back on the radiator. You may have to put more radiator fluid in the radiator. The level may fall as the car cools down. Now it is safe to drive your car. You have removed the trapped air from your cooling system.

Jun 28, 2012 | Cars & Trucks

1 Answer

I have a 2002 Volvo S60 air conditioning problem. Initially, the air conditioner will blow cool/cold air, but when I get in traffic and have to do a lot of stopping and starting the air turns warm. Have...


check to see if your cooling fans are working because when they dont work, your air will blow nice and cold when driving but will be hot air when stopped in traffic.

Jun 15, 2011 | 2002 Volvo S60

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I own a Volvo V40 Auto (year 2000) The heater fan is working but no hot air comes out although I've just tried it again and now seems to be O.K so the problem seems to be intermittent. I would be very...


might need to bleed heating system / radiator. Air lock could stop flow of hot water. Check water colour in radiator - if brown and gungy there could be a build up of sludge so radiator flush required.
when dial / lever moved to turn heat on / off see if you can hear anything moving - there should be! Quite often when heater turned on or off small solid wires move valves that are visible under dash and on engine bay firewall. Watch these rods when someone is turning the heater from cold to hot and see if anything is sticking or loose

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1 Answer

Winndscreen does not clear unless have air conditioner on


Blowing air across the windscreen does not necessarily clear away condensate from the inside. Water vapor condenses on any cool surface, and humid air blowing across a cool windscreen will result in more condensate on the windscreen. Often the air that blows across the windscreen is just humid AND heated, and doesn't solve the problem.
The air conditioner system performs two functions. Not only does it cool the air, it also extracts moisture, resulting in dryer air. Once the dried air is re-heated in the defroster system, it should allow the moisture on the windscreen to evaporate.
In other words, it sounds as though the defroster system is functioning properly.

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1 Answer

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this car comes with zonal climate control, make sure that the drivers side is set to cold too

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