Question about Ford F-150

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I have a 97 f150 the blender that controls air to heater core is stuck in the open mode and wont route air thru heatercore

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  • Ford Master
  • 946 Answers

Electric or vacuum operated? My F-150 manual doesn't say. Can you replace the actuator if it's electric? If vacuum it still may need replacing or the hose has got a vacuum leak somewhere.
don-ohio (:^)

Posted on Jan 02, 2017

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6ya6ya
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Posted on Jan 02, 2017

emissionwiz
  • 75108 Answers

SOURCE: heater core replacement

This is a really easy job, disconnect the heater hoses at the firewall, go inside the truck on the passenger side there is a plastic panel/cover over the core, 6 bolts/screws I think, remove the cover pull the core, tops 1 hour, as job at work I did them in 20 minutes.

Posted on Oct 15, 2008

blueextc3221
  • 15935 Answers

SOURCE: heatercore does not get hot only one hose is hot

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.
Flush the heater core 2-3 times, and if the obstruction does not clear, a new heater core is required.

Posted on Jan 29, 2009

  • 108 Answers

SOURCE: heater core-97 Pont. grand prix gt 6cy 3.8

the heater core hoses are under the hood on passenger side u can disconnect them from heater core and connect them together with a fitting that will withstand high tempature about 200 degrees ask local hardware store or autoparts store for fitting i think the size is 5/8 and the fitting only has to be 3 inches in length this will bypass heater core when ur done top of fluid and check for leaks with car running and warm

Posted on Mar 28, 2009

  • 583 Answers

SOURCE: both hoses to heater core are hot, blender door

if the air is definatly being blown through the heater core , then the core is blocked.if there is no hot coolant passing through the core then ------no warm air ---give it a good look see if you can see the deflector guiding the blown air is going far enough to send majority of air through heater good luck

Posted on Aug 22, 2009

  • 1 Answer

SOURCE: 97 ford f150 4.6 the pipe that gos to heater core

heater core cloged.

Posted on Dec 02, 2009

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1 Answer

Where is the heater control valve located?


If you are trying to locate some kind of water valve that routes the hot water to or away from the heater core, no such animal exists anymore. Hot water is always routed thru the heater core whether or not you are using the heater. The blend box under the dashboard has flappers that move to route air either thru the heater core, the A/C evaporator, or thru a bypass that routes around both. The blend box allows you to set temperature by adjusting the flappers. It also controls where the air goes; defroster vents, floor vents, or dash vents. If you are not getting heat, the problem is most likely that the blend box flapper is not operating correctly. This could be due to a sticky linkage, a bad vacuum motor, or a faulty control head. You could also have a clogged heater core, or a thermostat that is stuck open all the time. If you are getting heat and don't want it, the blend box flapper is also the most likely cause.

Oct 18, 2015 | 2003 Chevrolet Malibu

1 Answer

Heater runs all the time, even when heat turned to off, no ac either anymore. this is on a 1999 ford f150


sounds like an issue with your diverter door under your dash is stuck in heat mode. When you turn on a/c, the door should close off the heater core section and open up and let your evaporator (a/c) open . You will have to figure out if its your controller or the door. Older units used cables and had no issues. Yours probably has electronic control /motors, etc.

Mar 30, 2014 | 1999 Ford F150 Regular Cab

1 Answer

2002 mercury sable ac not blowing but heater works any ideas?


Could be a blender door issue. What a blender door does is mix the cold air from the AC with the hot air from the heater core. If you put the switch ALL THE WAY to hot, the blender door (usually an actuator) pushes the door up and allows only air passing thru the heater core to enter the cabin. If you push all the way to cold, it only allows air from the AC. If you put halfway, it mixes/blends the air...

Aug 04, 2013 | Mercury Sable Cars & Trucks

2 Answers

Very little heat from heater.. have replaced the thermostat, heater hoses are both hot, and the blender door is working fine ( drilled a hole in the heater box and stuck a camera in )


try running water thru the heater core. In one hose and out the other. Probably clogged. Also make sure value in the heater hose is operating.

Sep 20, 2011 | 1997 Ford F150 Regular Cab

2 Answers

1998 Jeep Wrangler. When I try to use heater, plenty of air comes out of vents, but not hot air...A radiator specialist said there was no problem with the heater core. What could this be?


THERMOSTAT STUCK OPEN OR HEATER.TEMPERATURE CONTROL MODE SWITCH NOT GETTING VACUUM OR THERE IS A ELECTRICAL PROBLEM IN MODE SWITCH.

Sep 14, 2011 | 1998 Jeep Wrangler

1 Answer

What do the heater core hoses connect two


which end one end hooks to heater core the other end hooks to radiator or side of engine hot water from the engine runs thru heatercore air pushs thru heatercore to cause heat in vehicle

Dec 28, 2010 | 1988 Chevrolet G20

1 Answer

This is a problem on a 1998 Olds Intrigue. Heat is on only on passenger side; cool air on drivers. Were told it was the blender and dashboard had to be removed. Any other solutions. Can it be done...


It is the "blender" door. Try getting to it thru the glovebox. Open the glovebox and there should be 4 or so 7mm screws holding it in. It pulls out. You will have to disconnect the little light in there also. This should give you access to the heat/vent doors on top of the heater core. Operate the heater controls and see if they are moving. They may be binding or stuck.

Good Luck. . . .
It that doesn't work.... the dash will have to be removed. It is quite a job.

Nov 26, 2010 | Oldsmobile Intrigue Cars & Trucks

1 Answer

88 Celica has no heat. AC works fine. Any ideas


the a-c and heater run on 2 different systems the heater needs coolant going thru the heater core to make heat by blowing air through it and the a-c uses it's own sealed system to cool the air so if you have no heat / it has nothing to do with the a-c working or not . first thing you do is check the cooling system like rad and coolant levels . you will have heater core hoses running from the engine to the firewall going to the heatercore . grab the heater core hose and feel if it's hot . if your hoses are hot then the heater core is bad or the blending doors are stuck .

Jan 22, 2010 | 1988 Toyota Celica Liftback

2 Answers

Replaced the heater core. now i cant get good heat


the heater control valve is likely crusted shut ...replace that and any hoses that where crimped for a long time to heater core and backflush system with heater open full...also be sure head units cables vacuum lines and electrical were not disturbed when you tore out heater core

Jan 13, 2009 | 1997 Pontiac Grand Am

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