Question about 1997 Chevrolet Tahoe

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Air in the cooling system and the heater does not work

The heater only works a little when i giveit some gas

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  • Casey
    Casey May 11, 2010

    Check your coolant level as this is what runs though your heater core and heats up your vehicle.

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  • 76 Answers

When is last time you checked your radiator probably low on fluid if full then need new heater core most likely

Posted on Dec 03, 2008

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2001 lincoln ls heater only blows out cool air and my a/c doesnt work either


heater working

what about
faulty directional flaps ? they have motors or vacuume actuators

does the air con system need a re gas?

Oct 19, 2016 | 2001 Lincoln LS

1 Answer

My heater does not work even if I increase the temperature, I do not know if the air con gas affect this since it is finished


the air con does nothing more than cool the air
if the temperature is not getting hotter then there is a problem in the heater system of the car
that could amount to blocked heater core , heater control not working ( module control) low coolant level, and air lock in the system or faulty thermostat stuck open

Jul 22, 2015 | Cars & Trucks

1 Answer

No heat in heater when idiling when reviv motor up has a little heat and heats up when ideling in traffic


Sounds like you may have combustion gasses creating an air lock in the cooling system. Or plugged heater core / radiator. Definitely a circulation problem of some kind either flow of hot antifreeze is restricted or the heater should blow very hot air especially when the car heats up so long as all the ducting and heater controls are functioning properly. If the vehicle has been overheated you more than likely have combustion gasses in the cooling system. Water pump will not work properly for combustion gasses that mix with coolant. Check to see if the coolant is beginning to get a little oily and dirty, this will indicate combustion gasses entering cooling system.

Feb 15, 2015 | 2001 Ford Focus

1 Answer

Heater only works while on the freeway


Sounds like either low coolant or air in the cooling system. Either you need to bleed air out of cooling system or repair possible leak in system. When there is air in cooling system and it goes into your heater core, heat is not transferred to the air blowing out of your vents.

Mar 22, 2014 | 2002 Nissan Altima

1 Answer

Fiat seicento 2000 reg keeps overheating after going 5 or so miles, light comes on then grumbling and water from expansion tank. had new radiator switch put on, took fan off and tested-works ok- but not...


This may be a puzzle...
The seicento (I drive the same car) likes to create problems in the heater section of the cooling system. The small pipes to it (behind the carburator) may be blocked or the entire heater may simply be dirty. Flushing the system with a water hose may help. Usually this problem starts slowly and goes away if you re-start the engine and then excellerate a few times. Check if your heater blows hot air - if yes, and if he keeps blowing hot air (does not cool down and get cold) ther is no blockage. If you have a blockage, your heater will only blow hot for a little while and then comes normal cool air - if this is the case, you have a blockage right in your heating system which runs your cooling system hot and the cap of your cooling tank will start leaking. This is a comon problem on older Seicentos....
Other general problems can also be the case, like defective thermostat, fan motor does not come on (check fuse and relais first).
In some cases, ther might be some air trapped in the cooling system and doing the above will also cure it. At last, check if your water pump is working.
Regards
Herbert

Sep 24, 2010 | 2006 Fiat Pininfarina

2 Answers

02 Infiniti I-35 3.5 heater air not hot enough...had system flushed and new themostat..vents and blower motor working fine.


Make sure that the radiator fan is going off like it is suppose too. Also, some vehicles have a shut off on the water inlet hose to by-pass the heater core for the A/C when it is running in the summer. This could be malfunctioning.

Jan 15, 2010 | 2004 Infiniti I35

2 Answers

New heatercore but no heat flushed system out but still no heat the dash gets hot but very little heat comes out when on for awhile the fan works just blows cold air


Did you run engine from cold, with heater on when you refilled the system? Try again, rad cap off, with heater on, and let engine get up to operating temperature, make sure you have good flow through rad ,leave cap off, until rad fan comes on to cool returning coolant to rad at least twice. Give engine a little extra rev, for 5 seconds or so, every once in a while to make sure flow getting through heater core, and add coolant as necessary. See if that helps, as it may just be an airlock in system. If your cooling system has any bleed screws incorporated, crack them once in a while as well.

Nov 05, 2009 | 2000 Oldsmobile Bravada

1 Answer

2006 pontiac grand prix vary little or no heat


Are you sure you got all the air out of the cooling system? Air pockets are very common problem when you do any work to the cooling system. An air pocket will do what you discribe.

Mar 18, 2009 | 2006 Pontiac Grand Prix

1 Answer

1994 toyota pickup heater stopped working


Sounds like there is air in the cooling system causing the engine not to overheat but the heater not to work. Flush cooling system and work the air out of the system.

Mar 01, 2009 | 1994 Toyota Pickup

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