Question about 1999 Chevrolet Blazer

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Air condition warm air. put in coolant freon but still warm air. water pump replaced. still the same.

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If it has climate control, the blended air door module behind the glovebox maybe the problem. It is stuck on the hot side.

Posted on Jun 02, 2010

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See if you notice a strange colored fluid leak from under the truck....this would mean your leaking he r134 refrigerant. if no leak,check that you have COMPLETLY filled the refrigerant...as it wont be cold if you are even half full.

also,check that the AC compressor is kicking in,as i have a blazer and the factory clutches on the compressor are junk.

Posted on May 01, 2010

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If air conditioner is warm then there is not enough pressure to activate the A/C compressor. Your system may take just over 2 cans but the question is where did it leak to? Put in dye top off the system and check for leaks.

Posted on May 01, 2010

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1996 M.Carlo Z-34 3.4ltr v-6 Changed noisy water pump, added fluid, engine warms up but there is no coolant flow. Changed thermostat, still no coolant flow when engine is running and warmed up. Also n


You may have gotten the wrong pump. Some are reverse rotation, depending on your belt routing. Remove the thermostat and see if the coolant is flowing in the PROPER direction.

Feb 11, 2015 | Cars & Trucks

1 Answer

Replace thermostat 03 explorer


Heater circuit of coolant system could be blocked by a trapped air bubble or a blockage in the heater core. Try having the heater core back flushed. Any good auto shop should be able to do this for you if you don't know how. To remove the trapped air bubble put a coolant flush valve in the heater core line that returns the flow to the water pump inlet. Connect a washing machine water hose to it then warm the car up, turn the heater temp control knob up to the max then open the flush valve on the heater return line to allow the air to be vented out--close the valve when the coolant flows out.(use caution he water blowing out of the hose will be hot. point it safely away into a bucket to catch the coolant) Check the thermostat for proper operation while you are at it so you know it is good. Put it in water on the stove and bring the water up to the thermostat set temp to see if it opens.

Dec 31, 2014 | 2003 Ford Explorer

4 Answers

I turned on my air conditioning today for the first time since last fall... it was not blowing cold air. It was working fine the last time i used it 3 months ago. Could it be a fuse problem?.. or maybe...


While the engine is running as you turn on the A/C , the compressor will latch on now as you will find the engine faulting in RPM as it comes on. Now if this is so the compressor, the solenoid clutch is good and the fault can be only loss of gas in the system. If not the compressor pumping pressure needs a check. Also if gas has leaked the system needs a test for leaks.

Feb 25, 2011 | 1999 Mercury Sable

1 Answer

My A/C is on but blows warm air. What can be the problem? I just had a new water pump put in and its in need of a new starter.


Could possibly be low on freon. You will need to have it checked out or run by autoparts and put a freon booster. (Self use can.)

Feb 21, 2011 | 2003 Chevrolet TrailBlazer

1 Answer

I was just recently in a car accident. My raditor broke and had to be replaced. Because i didnt want to pay a mechanic to do it i did the job myself. It worked out well but after dissembling it the coolant...


first you need to find out why the freon leaked out then repair that, then you will need a vac pump to vacuum the system for about 45 mins then if you lost oil add a couple of oz,when you lost the freon if there was a cloud of oil and gas then add 2oz before the vac down while system is open put into line or dryer or condensor, after the vac, then recharge to spec, there a label at the radiator support or on the hood that tells you how much freon the system holds,here you go it holds 1.48lbs of 134a freon.

Jun 16, 2010 | 1998 Saturn SL

4 Answers

2000 JETTA OVERHEATING AT FIRST IT WAS LOSING WATER SO WE REPLACE THE HOUSING PIECE ITIS PLASTIC AND WAS CEACKED. nOW ITS JUST GETTING HOT NOT LOSING WATER


Your water pump impeller has probably come apart, you will have to do a timing belt job to get a new water pump in there. If you are not comfortable with that, take it to a shop. But yes, to check for water flow, pull the return line on the coolant bottle (little one on the top) and hold it so any water that would come out would go into the bottle, and start the engine (the engine has to be cold to try this test) there should be an almost immediate flow of water, if no water comes out, even if you give it a little gas, (should be a decent flow, not a trickle) than your water pump is in fact dead, very very common problem on 1.8 & 2.0 Jetta's, Beetles, and Passats.

Jul 07, 2009 | 2000 Volkswagen Jetta TDI

2 Answers

Air conditioning system blows warm air


Ok I've been around too long...R134 (freon replacement product)

May 23, 2009 | 1996 Honda Civic

1 Answer

My 2001 lincoin ls gauge goes up to the h and then come back down


you probably have air trapped in the system. Have dealer or radiator shop bleed system.

I assume your cooling fan is working.

what engine v6 or v8?

SECTION 303-03: Engine Cooling 2001 Lincoln LS Workshop Manual
DESCRIPTION AND OPERATION Engine Cooling The cooling system components include the:
  • block heater (optional)
  • cylinder head temperature sensor
  • fan blade, fan motor and fan shroud assembly
  • radiator
  • pressure relief cap
  • degas bottle
  • radiator draincock
  • water pump
  • oil cooler (optional)
  • water thermostat
The water thermostat:
  • controls the engine coolant temperature.
  • allows quicker engine warm-up.
The degas bottle:
  • provides a location for system fill.
  • contains coolant expansion and system pressurization.
  • provides air separation during operation.
  • replenishes the engine coolant to the system.
The fan blade draws air through the radiator to help cool the engine coolant.
The fan motor:
  • operates only when the engine is running.
  • will not operate when the engine is off.
The engine coolant flows:
  • from the lower radiator hose to the water pump.
  • from the water pump to the engine block and the cylinder heads.
A closed water thermostat returns the engine coolant to the water pump. An open water thermostat allows the engine coolant to flow to the radiator.
Unsatisfactory coolant materials:
  • Alcohol-type antifreeze does not provide adequate water pump lubrication.
    • has lower boiling point
    • reduced antifreeze protection
  • Alkaline brine solutions will cause serious engine cooling system damage.
The cylinder head temperature sensor provides a signal to the temperature gauge.
  • will invoke failsafe cooling.
The optional block heater:
  • electrical heating element is installed in the block cooling jacket.
    • uses a standard 110V (220V in Europe) electrical supply
  • keeps the engine coolant warm during cold weather.
The auxiliary water pump (3.9L only):
  • provides heater coolant flow boost.
  • has a secondary function of providing engine-off cooling.

May 01, 2009 | 2001 Lincoln LS

1 Answer

REMOVING WATERPUMP


NOTE: This procedure may be easier if the radiator and shroud is removed. If the radiator is not removed, place cardboard in front so not to damage the radiator core
  1. Open the hood and disconnect the battery. Remove the lower engine cover.
  2. Drain the cooling system. CAUTION
    When draining the coolant, keep in mind that cats and dogs are attracted by ethylene glycol antifreeze, and are quite likely to drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantity. Always drain the coolant into a sealable container. Coolant should be reused unless it is contaminated or several years old.
  3. On cars without air conditioning, remove the fan.
  4. On cars with air conditioning, remove the air pump and generator mounting bolts, then remove the fan and air pump drive belt (pivot the generator and air pump in toward the engine). Remove the fan and pulley with set plate. Remove the hoses to the pump.
  5. Remove the 6 bolts attaching the water pump and remove the water pump assembly. Clean all gasket surfaces carefully. To install:
  6. Install the 6 bolts attaching the water pump with a new gasket.
  7. On cars with air conditioning, install the air pump and generator mounting bolts, then install the fan and air pump drive belt (pivot the generator and air pump in toward the engine). Install the fan and pulley with set plate. Install the hoses to the pump.
  8. On cars without air conditioning, install the fan.
  9. Refill the cooling system.
  10. Connect the battery, start the engine and check for leaks.

Apr 02, 2009 | 1987 Isuzu Trooper

4 Answers

BMW 328I No Heat ..Cold air only


water pump may be the way to test take off cap when cald hold reves see if water flys out if so ok if not water pump maybe on the way out

Jan 16, 2009 | 1999 BMW 328 Series

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