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My 1998 astro van heater only blows cold air no heat

Already replaced water pump thermistat

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6 Suggested Answers

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

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  • 416 Answers

SOURCE: heater blows hot air for awhile but than blows

check coolant level in radiator and coolant bottle sounds like it may be low on coolant

Posted on Feb 09, 2010

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  • 65 Answers

SOURCE: heater blowing cold air

Low fluid or bad therostat if it does it when engine is warmed up.Heater control valve replaced or mixing valve? If so you have a vacuum hose disconected

Posted on Oct 31, 2009

GasparMacari
  • 166 Answers

SOURCE: heater blowing cold air only

check the heating core or radiator for clogging or leaks

Posted on Nov 25, 2009

  • 108 Answers

SOURCE: Air, no heat '98 Astro. No leaks, engine

It sounds to me that you may have 2 problems. 1). Air Lock in the Heater Core. 2). Inactive Heat Damper in the Plenum.

But since you state that the Heater Hoses do not get warm that is indicative of an Air Lock in the Heater Core. This is a relatively simple fix. It is best performed COLD but requires a method of pressurizing the Cooling System. All reputable Auto Parts stores Sell and/or Rent Pumps that temporarily replace the Radiator Pressure Cap for Leak tests and curing Air Lock. The Collant Level must be filled FULL then pressurized and then loosening the Highest Heater Hose at the Firewall so that Air and a Small Amount of Coolant escapes. Once all the Air has escaped tighten the Heater Hose Clamp, remove the Pressure Pump, Restore the Collant Level to FULL, re-install the Pressure Cap and Start the Engine. As it Warms up you should be able to feel coolant running through the Heater Hoses and they should become warm.

Posted on Dec 07, 2009

babaphat
  • 24 Answers

SOURCE: chevy astro van heater blowes only cold air

the problem is probably the heater core, it can become clogged with dribris. this stops heat from the engine getting to it and then no heat.

Posted on Dec 08, 2009

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1 Answer

I have a 1998 4runner the heat blowns warm and when i come to a stop it blows cold , replaced heater core & thermostat already.


I hope this helps!
The heater on most all cars is higher than the engine and water pump in particular.
Because air rises, if there is any air in the system it will rise into the heater.
Try taking off the radiator cap and running the engine at medium speed with the heater on full.
The water pump should pump the air out of the heater and this could solve the problem..
It might take 5 minutes.
Be sure to keep the radiator full of coolant as you are watching.
Be Blessed.

Feb 16, 2013 | Cars & Trucks

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1997 astro van blows only lukewarm air?


sounds like your blend door is stuck in the middle of the operating range. this door directs air either fully or partially over the heater core or ac evaporator. when stuck in the middle u will alwaysd get a blend of both

Nov 17, 2012 | 1998 Chevrolet Astro

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2002 CHEVY ASTRO VAN HEATER BLOWS COLD


sounds like a sensor is out or your fuse is out try those two things hope that helps

Jan 23, 2012 | 2002 Chevrolet Astro

1 Answer

Not getting any heat. just replaced thermostat and water pump. still nothing. upper hose gets hot lower radiator hose cold?


it sounds like the thermistat was instald back words. are thare is a air bubble thare try berping the sistem the hights heater hose if that dos not help check thermistat once in a blue moon thay do fail

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2004 chevy 3500 van has rear heater and it works fine the front heat blows cold replaced thermostat and hot water shut off valve is there a module that opens a door for the heat if so where is at


I know on an astro van there is a heater valve under the hood on the passenger side. check the cables or vaccum lines going to the heater valve under the hood. If there is a module it will be mounted to the heater suit case under the right side of the dash

Dec 10, 2010 | Chevrolet G30 Cars & Trucks

4 Answers

Only Blows Cold Air


heat sensor for radiator fan switch, thermistat,water pump? Does hot air blow when moving? does car over heat when sitting idling for over 10 minutes. If so check fan first, then water pump. last cause thermisat

Mar 07, 2010 | 1998 GMC Safari

1 Answer

Chevy astro van heater blowes only cold air


the problem is probably the heater core, it can become clogged with dribris. this stops heat from the engine getting to it and then no heat.

Dec 08, 2009 | Chevrolet Astro Cars & Trucks

2 Answers

Air, no heat '98 Astro. No leaks, engine


It sounds to me that you may have 2 problems. 1). Air Lock in the Heater Core. 2). Inactive Heat Damper in the Plenum.

But since you state that the Heater Hoses do not get warm that is indicative of an Air Lock in the Heater Core. This is a relatively simple fix. It is best performed COLD but requires a method of pressurizing the Cooling System. All reputable Auto Parts stores Sell and/or Rent Pumps that temporarily replace the Radiator Pressure Cap for Leak tests and curing Air Lock. The Collant Level must be filled FULL then pressurized and then loosening the Highest Heater Hose at the Firewall so that Air and a Small Amount of Coolant escapes. Once all the Air has escaped tighten the Heater Hose Clamp, remove the Pressure Pump, Restore the Collant Level to FULL, re-install the Pressure Cap and Start the Engine. As it Warms up you should be able to feel coolant running through the Heater Hoses and they should become warm.

Dec 07, 2009 | 1998 Chevrolet Astro

6 Answers

Mercedes sprinter 308 cdi mwb van heater blower not working and have tested all fuses


hi got an r reg mercedes sprinter van mwb got no heat on the heater just blowing cold?

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1 Answer

2000 chevy astro cargo van. the heat registers on the gage but little comes out and only out defrost. thermostat????


If it is blowing hot air out of the defroster and not out of the heater vents then the door that directs the heat from the defroster isn't working properly it is blocking the heat from going to the heater vents. Also check the cold air door. It sounds like it isn't closing all the way to shut off the cold air and not letting the hot air pass.

Oct 06, 2009 | 2000 Chevrolet Astro

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