Question about 2001 Chevrolet Silverado 1500

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Restricted air flow from heater/AC - 2001 Chevrolet Silverado 1500

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Check the blower inlet. There may be something blocking the inlet. If that is clear the heater/ac core may be matted with hair and dirt.

Posted on Jul 16, 2010

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Posted on Jan 02, 2017

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SOURCE: Heater blows cold, and fan switch only works on 4 and 5

working on 4 and 5 speed that the resistor that broken cold air you got to move the selector to see the motor that move the trap hot and cold sometime when the motor was not move to the hot side for a long time its jam the motor on the passager side under dash put to hot and gently tap the motor tanks pierre

Posted on Nov 09, 2008

  • 36 Answers

SOURCE: Can't change air flow direction on ac/heater control. Only blows up to windshield.

It will be a cable that will be disconnected. or broken. Youll have to take some of the dash apart to see the cable and follow it to the switch. Dont be affraid to take some things apart and when you cant see, use a mirror to help you see behind the dash. work the control and watch the action. You will fix this dont get frustrated. good luck

Posted on May 22, 2009

  • 109 Answers

SOURCE: 2006 ram - restricted air flow. where are the

If your talking about no air flow, at the vents, floor,defrost, there are no doors that will restrict air flow, then you have a plugged Ac evaporater core, with foriegn matter, leaves, dirt, and oil from the ac itself, leak in evap leak cause this, as long as the blower is working on all speeds, remove the motor for inspection and evap , an other way to inspect the evap, remove the evap sensor grommet, look inside of hvac, the core will be plugged, this is an expesive repair to do. GOOD LUCK. RDJRP

Posted on Aug 16, 2009

  • 1 Answer

SOURCE: heater fan not working

if i turn on fan it stops and starts and stop and starts

Posted on Nov 02, 2009

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If vehicle is equipped with a cabin filter, it may be plugged. The evaporator core may also have restricted fins on the outside from dirt/debris and will cause restricted airflow. A poorly operating blend door motor will also cause an airflow problem

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The ac in my 92 toyota paseo is only blowing hot air, after driving for a long time it gets slightly cold but thats it


the hose going to the condensor should be hot, this means the compressor is working . The cooling fan should be on ,confirm air flow is not restricted.also make sure the heat is shutting off by pinching off a heater hose.

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A low coolant level will do this as well as a thermostat being stuck in the open position cure is to replace the thermostat another cause is low coolant flow through the heater core and could be partially plugged flushing the heater core will fix this condition hope this helps

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Restricted air flow 98 grand am has new heater


yes the ac evaportater can get plugged with dirt and debris like leaf matter, also check to see if your car has a cabin air filter, if it does that can cause the problem, consult the dealer for more on this filter, not sure if your car uses one..

Sep 28, 2009 | 2000 Chevrolet Silverado

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2006 ram - restricted air flow. where are the


If your talking about no air flow, at the vents, floor,defrost, there are no doors that will restrict air flow, then you have a plugged Ac evaporater core, with foriegn matter, leaves, dirt, and oil from the ac itself, leak in evap leak cause this, as long as the blower is working on all speeds, remove the motor for inspection and evap , an other way to inspect the evap, remove the evap sensor grommet, look inside of hvac, the core will be plugged, this is an expesive repair to do. GOOD LUCK. RDJRP

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1 Answer

1995 cadillac deville 4.9 eng no heat


The heater in your car depends upon a flow of hot coolant going through the heater core in order to get hot air into the car. If the heater core is partially plugged, it will restrict the flow. If you have a head gasket that is putting exhaust into the cooling system, it will eventually get into the heater core. When this happens there is no coolant in the heater core to make the air warm. If the water pump vanes have corroded away the result will be very poor coolant circulation causing the heater to not blow hot air. If your car is equipped with a heater control valve that is not functioning properly, the coolant flow will be restricted. One or a combination of these factors is likely the culprit in your case.

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Jan 22, 2009 | 1992 Cadillac DeVille

1 Answer

Does not blow hot air (heat)


The heater in your car depends upon a flow of hot coolant going through the heater core in order to get hot air into the car. If the heater core is partially plugged, it will restrict the flow. If you have a head gasket that is putting exhaust into the cooling system, it will eventually get into the heater core. When this happens there is no coolant in the heater core to make the air warm. If the water pump vanes have corroded away the result will be very poor coolant circulation causing the heater to not blow hot air. If your car is equipped with a heater control valve that is not functioning properly, the coolant flow will be restricted. One or a combination of these factors is likely the culprit in your case.

To attempt to clean the core, you must flush the system multiple times. If this does not work, the core cannot be cleaned and must be replaced.

Jan 16, 2009 | 1995 Jeep Grand Cherokee

1 Answer

My 91 cadillac devile has no heat , just cool air blows even when


The heater in your car depends upon a flow of hot coolant going through the heater core in order to get hot air into the car. If the heater core is partially plugged, it will restrict the flow. If you have a head gasket that is putting exhaust into the cooling system, it will eventually get into the heater core. When this happens there is no coolant in the heater core to make the air warm. If the water pump vanes have corroded away the result will be very poor coolant circulation causing the heater to not blow hot air. If your car is equipped with a heater control valve that is not functioning properly, the coolant flow will be restricted. One or a combination of these factors is likely the culprit in your case.

if the car is not overheating, the thermostat is working fine.... replace or flush the heater core multiple times to try and eliminate sediment build-up.

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1 Answer

Very low air flow through vents despite the fan working well


It is very likely that the Air conditioner evaporator core is restricted due to leaves or some other object may be blocking air flow like a plastic bag, does it do this on both outside air and recirculation setting?

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