Question about 2000 Chevrolet Blazer

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My heater wont get warm? The temp gauge gets up to around 180 degrees. What should i check first?

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There are two rubber hoses, about has big around as a thumb, going into the firewall just above where the front passenger's feet would be. First thing I would check is to see that both are warm after the car warms up. These are the coolant supply and return lines for your heater core. If it is plugged, one will be warm and the other cool. Generally interior heating problem where the engine is otherwise normal will be a heater core issue.

Posted on Oct 05, 2010

  • michael_v_tu Oct 06, 2010

    Could it be a valve or the temp control switch?

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1 Answer

Bad thermostat? Heater gets warm, but cools down as thermostat fluxuates between 180 and about 230. It goes back and forth when it is @180 heater blows warm air, but when it goes to 230 etc. the air b


Are you sure there are no air pockets in the cooling system ?
You should have heat anytime the engine temp is above 140 degrees regardless what the thermostat is doing.

Nov 13, 2014 | Cars & Trucks

1 Answer

I have a 98 Bonneville, the heater/defroster is blowing out cold air. I drove around for 30 to 40 minutes checked the radiator and it was cold to the touch. could it be the thermostat


The dash gauges are notoriously inaccurate. But it is possible that the thermostat is stuck open. Does the upper radiator hose get hot after engine warmed up? Also feel both heater hoses-when engine is warm, both should be hot-indicating the coolant is circulating through the heater core. If heater hoses are hot, and you still have cold air, the temperature blend door on the heater case may not be operating.
Try a new thermostat and see if engine warms up faster and better.

Dec 10, 2013 | 1998 Pontiac Bonneville

1 Answer

Heater issue


This sounds like a thermostat that is fully open all the time. It allows the engine coolant to warm when sitting still (no air being forced thru the radiator), but even that goes away when moving, since the air through the radiator will remove that heat from the coolant. Does you van have a temp gauge? Is so, at full operating temp. most vehicles have coolant temps of 180-195 degrees F, depending on the thermostat installed. Anything less indicates a thermostat that is starting to malfunction.

Dec 08, 2013 | 2000 Mercury Villager

1 Answer

Please describe your my blower works in my 1999 windstar but it wont get warm problem


If your not getting any heat out of the vents and the blower motor is working than the first thing to do is check the coolant level. If it is low the first thing to stop working is the heat.

If its full than make sure the engine is coming up to temp. The temp gauge should read around 200 degrees F. when the engine is up to full operating temp.

If the those two are o.k. that make sure you hear a difference in air flow out of the vent when you switch the heat selector from full cold to full hot. If you hear no difference than you may have a blend door or blend door actuator problem.

If all that checks out than the last thing may be a plugged heater core. Especially if the coolant is muddy looking (really common with fords). Back flushing the heater core may help or cure the problem.

Dec 16, 2010 | Ford Windstar Cars & Trucks

1 Answer

My heater does not get hot. the temp. is around 200. it's just a little warm.


Since your blower is working and it is a heat issue,thats where we'll start,First thing is have you checked the coolant level in the radiator when engine is cold,make sure it is filled to top,next verify you have coolant in reserve ,Start your van and get it up to normal operation temperature,If your heat gauge on the dash works correctly it should be 190 degrees,Now lift the hood and locate the two heater hoses going into the heater assembly at the fire wall,Both hoses should be hot to hold on to,if both are hot and no heat inside your problem will be the blend air door in heater assembly.
if neither hose is that hot you need to replace the thermostat in the engine to get it up to 195 degrees.
if one hose is hot and one is luke warm then the heater core is blocked and to blame. hope this helps you.

Jan 15, 2010 | 1997 Dodge Ram 1500 Club Cab

2 Answers

Heater at times blows cool air and at times works properly. Please help......


try putting a piece of card in front of rad no more than 2/3 the rad area

Jan 12, 2010 | 1999 Chrysler 300M

3 Answers

What the normal temperature operating range indicated on the temp gauge?


195 degrees is the typical high end on the thermostat (when the thermostat opens), so the temp gauge should read a max of 195 degrees, give or take a few degrees. Some people replace their thermostat with a lower temp one, such as a 180 degree one. Then the gauge will read lower (approx 180 degree max). So the range is typically from cold at start to just under 200 degrees.

Jul 31, 2009 | 1995 Oldsmobile 88

2 Answers

1998 Dodge Durango no heat when using heater.


BLEND DOOR STUCK OR BROKEN. NEEDS TO REMOVE DASH AND HEATER/EVAP CORE BOS TO REPAIR REPLACE.

Jan 08, 2009 | 1993 GMC Safari

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