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Restricted air flow 98 grand am has new heater

Restricted air flow 98 grand am has new heater core is evaporator obstructed

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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..

Posted on Sep 28, 2009

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Why don't I have much air flow on my heater and air conditioning on my 2007 or Ranger


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

May 30, 2015 | Ford Ranger Cars & Trucks

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Heat not working


Sounds like the air blend door is not opening to let heat in.

Engine coolant is provided to the heater system by two 16 mm (5/8 inch inside diameter) heater hoses. With the engine idling at normal running temperature, set the heater-A/C controls as follows. Temperature control to full Heat, Mode control to Floor, Blower control to the highest speed setting. Using a test thermometer, check the air temperature coming from the center floor outlets and compare this reading to the Temperature Reference table.

If the floor outlet air temperature is insufficient, check that the cooling system is operating to specifications. Both heater hoses should be HOT to the touch (the coolant return hose should be slightly cooler than the supply hose). If the coolant return hose is much cooler than the supply hose, locate and repair the engine coolant flow obstruction in heater system.

POSSIBLE LOCATIONS OR CAUSE OF OBSTRUCTED COOLANT FLOW
If coolant flow is verified and the heater floor outlet temperature is insufficient, a mechanical problem may exist.

POSSIBLE LOCATION OR CAUSE OF INSUFFICIENT HEAT
  • Obstructed cowl air intake.
  • Obstructed heater system outlets.
  • Blend-air door not functioning properly.
TEMPERATURE CONTROL
If heater floor outlet temperature cannot be adjusted with the heater-A/C control temperature control lever, one of the following could require service:

Jan 21, 2014 | Cars & Trucks

1 Answer

2001 Jeep Grand Cherokee heater does not work. Saw the Youtube videos, cut hole in box, verified blend doors both operate when heat turned up. Flushed radiator with a commercial radiator treatment...


probly need a new heater core--get a haynes manual or library sec629 has pro mechanics series--if u get new one test evaporator and blower motor also to save labor

Jan 16, 2014 | 2001 Jeep Grand Cherokee

1 Answer

Air conditioner blows heated air


Sounds like ??
If the compressor is running and the system is full of freon, you may have a blend door problem under the dash. The blend door directs air flow thru the heater core and evaporator core depending on the temp setting on the dash.

Jul 24, 2012 | 2000 Mercury Grand Marquis

1 Answer

98 bonneville-heater does not blow hot air. Coolant level is good,tstat works, I have flushed the core even though it wasnt clogged,blower works.I have a digital thermonter for pipes,it clamps on to the...


Well looking at your tests here the only logical explanation is that you have a bad blend door switch, blend door servo, air leak in the control valve for the blend door, or the blend door has broken off in the air duct or some other obstruction in the air duct blocking the flow of air to the heater core.

Jan 20, 2010 | 1998 Pontiac Bonneville

2 Answers

I HAVE A 95 JEEP GRAND CHEROKEE AND ALL I GET IS LUKEWARM AIR WE HAVE FLUSHED THE SYSTEM CHANGED THE THERMOSTAT, RADITOR CAP AND HOSE, WATER PUMP NO CANGE WHAT ELSE CAN I do?


If your gauge is showing correct operating temperature and you are getting no heat from the heater, check (just feel them) the hoses leading from under the hood through the firewall that service the heater. One should be uncomfortably hot, the other only warm. If they are pretty close to equal or even cool, you have an obstruction in the heater hoses. Rubber hoses in the cooling/heating system are made up of laminated layers and if aged enough, the inner lining can separate and collapse blocking the flow of water either to or from the heater core. Sometimes, if bad enough, squeezing the hoses by hand can even locate the failed section; it will be noticeably weaker than the rest.

Jan 13, 2010 | 1995 Jeep Grand Cherokee

1 Answer

96 Jeep Grand Cherokee will not blow out hot air


It's possible you are not getting enough coolant flow to your heater core. Try pulling the hoses off the core, blowing it out with air compressor, fill with water and blow out again. Try this about five times and see what happens. Alot of times these cores will plug up or have restricted flow. They will blow warm at low speed but it won't flow enough hot coolant through to stay hot on high blower speed.

Feb 09, 2009 | 1997 Jeep Grand Cherokee

2 Answers

Heatercore does not get hot only one hose is hot


First make sure you have the radiator full of antifreeze also check overflow to make sure its at proper level . then let car warm up and feel hoses that go to firewall tword heater core and see if one of them are warm if so you have a blocked water control valve or its got a vacuum line off going to it .. Thanks Jerry holler if this is not it we will go from there.

Jan 29, 2009 | 1999 Ford Taurus

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

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