Question about 1997 Jeep Grand Cherokee

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Heater is only blows hot air at high rpm. engine temperature is at 100c

Posted by Anonymous on

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6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Heater blows cold air when idle

Sounds like you may have a partially plugged heater core. You could flush this out separately, from flushing radiator & engine block. Diconnect heater hoses going to your heater core and clamp off, so not to loose coolant from engine. Now hook up separate hose to one side of heater core pipe and flush out with typical garden hose. Repeat procedure on both heater core inlets. Reconnect original heater hoses and test difference. You may have to add an additional litre of antifreeze. If this don't work i suggest changing heater core. Good luck.........Ron.

Posted on Jan 03, 2009

  • 6982 Answers

SOURCE: 98 XJ cherokee sport 4.0 a/c blows hot air not

check that the heater control valve on the heater hoses is working, also check that blend door inside heater box and blend door vacuum motor are working. Likely the problem is with the door or motor, but unfortunately, the entire heater box needs to be removed to get to them on most vehicles.

Posted on Jul 11, 2009

  • 396 Answers

SOURCE: heater doesn't blow hot air but the engine

The first thing to check for this condition is the heater control valve. This is usually located up close to the firewall behind the engine. There will be coolant hoses attached to it. This valve opens and closes to let hot coolant enter the heater core and to cut off this coolant when heat is not needed.

There should be an arm on the top of the valve that is attached to a cable from inside the car. When heat is called for, the cable should move the arm, thereby opening the valve. Make sure this arm moves freely.

Posted on Oct 21, 2009

  • 4336 Answers

SOURCE: grand cherokee heater blows cold air

Check the coolant level, sounds like you may be slightly low....Be sure heater is on high when filling the system....Look for any air bleeds...

Posted on Dec 06, 2009

ramairgto72
  • 75 Answers

SOURCE: My 2000 Grand cherokee only blows warm air from

This is a common problem with WJ Grand Cherokees, it's called a "Blend Door".

In the heating and cooling system you have doors that open and close to give you warm and cold air and a mix of both.

What you have is an arm that pulls a door with peg on top, the peg tends to snap off. As you said your dealer replaced the blend door or doors I would take it back as is has blend door all over it.

Yahoo and youtube "jeep grand cherokee blend door repair"

I had a 02 limited blend doors issues (note the issueS) and was lucky to have it still covered.

I do hope this helped.


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Posted on Nov 24, 2010

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2 Answers

Heater temp on high only bows luke warm air after driving. A/C works just fine.Plenty of cold air from it


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My 1999 Chevy Malibu runs hot? It started when it overheated. We changed the thermostat, then water pump, then temp sensor gauge and the temp gauge goes high but only when the heater stops blowing hot...


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The heater in my 2006 Dodge Grand Caravan only blows warm air while on low. If the dial is turned to high it blows cold air. What is the problem?


It sounds like the heater valve is not operating. Find the valve on the engine firewall passenger side and manually open the valve. Find it by following the 3/4 inch heater hose to the firewall where it is connected to the valve. Most likely the cable ( or vaccum hose)from the temperature dial to the valve needs replacing.

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1 Answer

No heat air is blowing cold


First you have to identify what causes the problem.
To do this you have to:
1) When engine is cold check the level of coolant. If it is low fill it up.
2) Start engine and check if engine reaches regular temperature. If your engine is not heated enough it means your thermostat does not work properly and should be replaced.
3) If engine temperature is normal, then check the temperature of pipes that go to/from heater core. These pipes are located up the fire wall (easier access is from the passenger side). If pipe/pipes are cold (even engine is worm) it means you heater core is plugged and should be flushed. Keep in mind, flushing the whole cooling system is different from flushing heater core.
4) If pipe/pipes are hot/warm, turn off the fan, switch controller to the hot position, wait for 3-4 minutes and turn on the fan. Note if the cold air blows first or warm air blows first but it cools down in 5-10 seconds. If the air blows cold than it is most probably the problem with blend door or blend door actuator.
5) If air blows warm first and then cools down, then while running engine and remaining the transmission in PARKING position, press on the gas pedal until your engine reaches 3,000 RPM. Check if your heater blows warm/hot air. If it does, then your water pump does not work properly and should be replaced. If the air still cold, I would suggest to flush the heater core.

Oct 22, 2009 | 1998 Ford Taurus

1 Answer

MY 1998 FOR TARUS HEATER WILL NOT WORK.WAS DRIVING


It is most probably the problem with blend door or blend door actuator. But just in case I would suggest to follow the entire procedure:

First you have to identify what causes the problem.
To do this you have to:
1) When engine is cold check the level of coolant. If it is low fill it up.
2) Start engine and check if engine reaches regular temperature. If your engine is not heated enough it means your thermostat does not work properly and should be replaced
3) If engine temperature is normal, then check the temperature of pipes that go to/from heater core. These pipes are located up the fire wall (easier access is from the passenger side). If pipe/pipes are cold (even engine is warm) it means you heater core is plugged and should be flushed. Keep in mind, flushing the whole cooling system is different from flushing heater core.
4) If pipe/pipes are hot/warm, turn off the fan, switch controller to the hot position, wait for 3-4 minutes and turn on the fan. Note if the cold air blows first or warm air blows first but it cools down in 5-10 seconds. If the air blows cold than it is most probably the problem with blend door or blend door actuator.
5) If air blows warm first and then cools down, then while running engine and remaining the transmission in PARKING position, press on the gas pedal until your engine reaches 3,000 RPM. Check if your heater blows warm/hot air. If it does, then your water pump does not work properly and should be replaced. If the air still cold, I would suggest flushing the heater core.

Oct 17, 2009 | 1998 Ford Taurus

1 Answer

Heater not working


First you have to identify what causes the problem.
To do this you have to:
1) When engine is cold check the level of coolant. If it is low fill it up.
2) Start engine and check if engine reaches regular temperature. If your engine is not heated enough it means your thermostat does not work properly and should be replaced.
3) If engine temperature is normal, then check the temperature of pipes that go to/from heater core. These pipes are located up the fire wall (easier access is from the passenger side). If pipe/pipes are cold (even engine is warm) it means you heater core is plugged and should be flushed. Keep in mind, flushing the whole cooling system is different from flushing heater core.
4) If pipe/pipes are hot/warm, turn off the fan, switch controller to the hot position, wait for 3-4 minutes and turn on the fan. Note if the cold air blows first or warm air blows first but it cools down in 5-10 seconds. If the air blows cold than it is most probably the problem with blend door or blend door actuator.
5) If air blows warm first and then cools down, then while running engine and remaining the transmission in PARKING position, press on the gas pedal until your engine reaches 3,000 RPM. Check if your heater blows warm/hot air. If it does, then your water pump does not work properly and should be replaced. If the air still cold, I would suggest flushing the heater core.

Oct 17, 2009 | 1998 Ford Taurus

1 Answer

The heater is blowing cold but the engine temperature reads high


Hi
I would first check to see if both heater hoses are hot to the heater.
if 1 is hot and 1 is cold the heater control valve is closed or the heater core is plugged.

Jan 14, 2009 | 2005 Dodge Ram 1500

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