Question about 2000 Pontiac Montana

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2000 montana, No heat all of a sudden. Motor comes up to temp blows cold. What could it be?

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It sounds like the heater core is stopped up and the hot air can not blow thru

Posted on Mar 04, 2011

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2000 caddy Seville ...after starting and engine warm turn on the heater and it blows cold air. Fan works / waiting for hot air and then all the sudden it kicks in. Engine at normal temp


Low coolant, if there is an air pocket in the engine it will make it to the heater core. Once there , the air coming out is cold/cool. Once the coolant fills the heater core, it gets hot. If the coolant is fine hot or cold, then have the HVAC system scanned.

Oct 09, 2016 | 2000 Cadillac Seville

1 Answer

2003 Pontiac Montana heat gets hot in front, blows but seems weak, and no heat on rear controls but blows ******* rear. what is going on?


Is your heater blower motor working on all speeds ? Are you get any air coming from the rear vents ?

Feb 25, 2015 | 2003 Pontiac Montana

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My 2000 Montana gauge is showing that's over heating even when it's driven a short distance and when driven on the freeway it's not smelling like its over heating or there no steam coming


If the gas gauge does not work correctly and the temp gauge reads hot, you could have a problem with the instrument panel.
Both gauges get power from the same circuit, but each gauge is grounded by its own sending unit.
If the temp gauge is reading correctly, you could have air in the cooling system and it is not actually full of liquid coolant.

Apr 14, 2013 | 2000 Pontiac Montana

1 Answer

2000 pontiac bonneville blows hot and cold at the same time


Sounds like the blend door motor isn't working.

Jan 20, 2013 | 2000 Pontiac Bonneville

1 Answer

I was driving my 2000 Pontiac Montana with my heater on then all of a sudden it stop blowing hot air. Only cold air would come out of the vents.


ensure the coolent water level in your car system is full.
the heater radiator is set higher than the main system so when the water gets low there
is none in the heater.

as the fault came suddenly it also maybe the heater control switch or the thermostat has a problem
and has shut off the heat. check fuses to ensure there is not a problem there.

I hope this was helpful.

May 23, 2011 | Pontiac Montana Cars & Trucks

1 Answer

My 2002 Pontiac Montana engine temp quickly increases at idle and while stopped at lights. The engine temp is OK while moving. Please advise of possible causes as I am concerned about engine damage from...


Check your cooling fan motor at radiator, should come on at about 220 -225 deg, while moving you have air blowing through radiator and will keep engine cool, at stops no air going through radiator and will cause over heating. Have fan check out

Jan 04, 2010 | 2002 Pontiac Montana

1 Answer

Blowing cold air no heat


make sure coolant is in radiator....if its full, thermostat may need to be changed.....if thats not it check heater coil

Jan 03, 2010 | 2004 Pontiac Montana

1 Answer

2000 pontiac montana heat issues


Try checking the cabin air filter, if equiped. It may be clogged making it draw more cold fresh air. Check your owner's manual to see if you have one or not, and it's location.

Dec 14, 2008 | 1999 Pontiac Montana

1 Answer

Fan not blowing hot or cold


why would the heat on a 2000 Chevy Trailblazer only produce heat when the temp dail is to the right to the red indicator, but produces cold air when the temp indicator is any where else on the dial. Thank
Charles McLane
[email protected]

Nov 13, 2008 | 2000 Chevrolet Impala

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