1998 F150 5.4 A/C Problem
#1
1998 F150 5.4 A/C Problem
I have a problem that just started about a month ago. My A/C has always worked well, no leaks in the system, compressor is also good. When I first start the truck, the A/C blows cold. As soon as I hit the accelerator I hear a clunk in the vents then it blows immediately HOT. I was driving today on about a 3 hr trip and the A/c blows hot until I stop at a light then I switch on the Air and it works good. As soon as I hit the accelerator same thing, clunk the immediate HOT. Does anyone have and ideas about this? I think I may have a vacuum issue but I don't know alot about A/C systems.
#3
Thanks I wasn't sure but, I will look around to see how to fix it. Thanks.
Well I pulled the floor vent out and the acuator. When I pulled the acuator out, out fell three plastic pieces. I fould the problem now I need to fix. Not sure if I am up to pulling dash out or not.
Well I pulled the floor vent out and the acuator. When I pulled the acuator out, out fell three plastic pieces. I fould the problem now I need to fix. Not sure if I am up to pulling dash out or not.
Last edited by jroc021; 06-13-2009 at 03:58 PM. Reason: Found Problem
#4
actuator
Thanks I wasn't sure but, I will look around to see how to fix it. Thanks.
Well I pulled the floor vent out and the acuator. When I pulled the acuator out, out fell three plastic pieces. I fould the problem now I need to fix. Not sure if I am up to pulling dash out or not.
Well I pulled the floor vent out and the acuator. When I pulled the acuator out, out fell three plastic pieces. I fould the problem now I need to fix. Not sure if I am up to pulling dash out or not.
#5
#6
thanks
#7
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#8
blend door
I wish mine was that easy, my dash has to come out, i have cut the hole and taken the door out but i can access my activator motor, thats why the dash has to come out, if i could bend the metal piece at the top up out of the way to get the door in i could and i may have to cut one side of the circle piece that hold the top of the door to bend it, i might could get it in but it back in there a piece and im not sure that im going to even fix it my son suggested putting 2 cutoff valves under the hood on the heater hoses and just turn them off in summer, one thing i do know is im not pulling the dash, and damn ford for making this mess
#9
Why do you think it's the blend door? Are the high and low pressures correct? Is the compressor clutch engaging?
#10
hey
i cut the hole behind the dash and took out the door that was broken at the bottom, the activator is working but i have no access to it under the dash,