I drive a Ford F150 Extended Cab Pickup Truck. I have plenty of fluid in my radiator. The pressure in the lines seems ok. The heater core in and out is both hot and under pressure. I don't know what else I can check without spending thousands to do it. Someone said it might be in the knob, but that it would cost around $700. to check that.
2006-11-04 11:21:13 · 11 answers · asked by qttrish 1 in Cars & Transportation ➔ Car Makes ➔ Ford
Inside the vehicle, the airflow is controlled by vacuum controlled doors, - different ones move to open path for air to flow through to different places! There is one that opens area over the heater core, and closes the one over the area to the a/c. There is another that transfers the air from defrost to heat position (though some deftost flows all the time!) and another to transfer air from louvers in the dash to floor "registers". If you have lost the vacuum, none of these things is going to switch over, it is going to stay in a/c positon....... Also the a/c on most cars runs when you have "heat " turned on -- to dehumidify the air coming out, - (it keeps the windows from steaming easily). In addition to al this, the water control valve in the heater hose (if it has one) also is controlled by vacuum!-- By the way I assume the blower is working ok??
So you can see all the problems you can have if the vacuum hose has a hole in it, or is disconnected (or broken somewhere). A vacuum leak will generally affect the engine at idle, too, - as it is adding too much air in proportion to the amount of gas being put in! this will generally make the engine run rough at idle! If you listen inside with the engine running, - (and the engine isn't too noisy) you can hear if there is a vacuum leak inside, -- the same applies if you listen under the hood (mostly on the passenger side near the firewall). I generally makes a "sucking" or "whistling noise" -- depending on size of the hole!
It is possible that your "control switch" is bad, but they don't fail very often. In addition to the heater "blower speeds", it does the vacuum switching! And if it has broken, - you should hear the vacuum leak as you switch "modes"! When you switch from "cool" to "heat" , - you should hear a "pop" as the door flips over - (the noise will be in the area behind the glovebox!) Also it should make a noise when you switch from the louvers (where air comes out on a/c ) to direct heat to floor (by your feet), -( I don't remember if the noise is audible when switching from "heat' to "defrost).. Vacuum leaks inside are going to be from the area where the control is to the passenger door area- as nothing the control operates requires vacuum on the drivers side of truck!
Unless you have Climate control" (& I don't think it is available in a pickup), - there is no way the control should cost $700. the part might cost $50-70, and the labor might run $75. But this is a job you can do -if you want to take the time , - Maybe 2 hours-- (Mechanic 30-45 minutes)-- It requires taking out part of the dash (cover over the radio panel, and heater control). It is not a real hard job!! (But as I said I don't think it is the control anyway!)
I reccomend that you go to a car parts store (like Auto Zone type), - and spend the money to buy a "Haynes auto repair manual" for your vehicle and year model (it should cost you around $20 or less). Chilton has one too, but I don't like theirs as well!! This will show you how the heater is built, how the controls work, and how to service whatever you have to "get into"! It is a good book, and tells you lots of things you might need to know as you continue to use the truck!
I have been a mechnaic for 55 years, and I still buy a manual for every car I get! They save me time by showing me where to look for the parts I suspect are bad!
2006-11-04 12:13:17 · answer #1 · answered by guess78624 6 · 3⤊ 0⤋
Check the Thermostat is working by putting it in some Boiling water, the centre piece should then move. Feel all the Water pipes, if one of these is slightly cooler than the others then you have a Blockage . You may need to Replace the Radiator Cap as this may be old.
2016-03-19 03:35:09 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Your truck has a motor that moves the blend door under the dash in the center, when you remove the lower trim, you should be able to cycle the temp on the control head and watch the door move. Temp door is probably broken, or motor failed.
2006-11-08 11:18:05 · answer #3 · answered by tdot 3 · 0⤊ 0⤋
therastat is the way 2 tell u if the engine is hot not 2 give u heat go 2 a macanic plse
2006-11-04 21:42:35 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Didn't say the year, 1997 on up its the blend door motor, blend door, if your lucky temperature control switch
2006-11-04 14:26:49 · answer #5 · answered by kayef57 5 · 0⤊ 0⤋
well the heater cord might be broke and the same thing was sort of happening to me try to change the heater case
2006-11-04 12:36:34 · answer #6 · answered by Lyn n 1 · 0⤊ 0⤋
if the fan is working then you have a vacuum hose that is not opening the vents to let heat in. check your vacuum hoses.
2006-11-04 11:31:21 · answer #7 · answered by george 2 6 · 0⤊ 0⤋
Go to a mechanic or do u have a friend that can fix it for free? Either one of those.
2006-11-04 11:32:03 · answer #8 · answered by E-mail ME!!! 1 · 0⤊ 0⤋
flush the heater core
2006-11-04 12:31:36 · answer #9 · answered by cwgrlmeiniowa 3 · 0⤊ 0⤋
Are the ducks opening?
2006-11-06 03:23:00 · answer #10 · answered by George K 6 · 0⤊ 0⤋