Heater blower location
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New User
Joined: Nov 2008
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Heater blower location
Hi the heater in the hauler dont work and since its snowing it time to fix it
starting at the blower
where is the blower motor
2 the control lever at the top cool - heat
doesnt seem to be working
maybe cable broke
starting at the blower
where is the blower motor
2 the control lever at the top cool - heat
doesnt seem to be working
maybe cable broke
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 40
From: EXTREME southwest CT
I don't have an '86 F-350 (assume this is what you're talking about)
My dash controls are a little different than yours, but I'd have to assume they function pretty much the same.
Are you saying the blower motor (fan) is not working?
Do you have all fan speeds?
The motor itself should be mounted in the plastic plenum.
My truck has a vacuum operated "outside air-heat" control.
This one lever doesn't feel like it's doing anything because it's only controlling a vacuum port. But I checked this weekend and after patching a cracked vacuum line it works fine.
Perhaps the blend door hinge has broken?
That's not uncommon.
My dash controls are a little different than yours, but I'd have to assume they function pretty much the same.
Are you saying the blower motor (fan) is not working?
Do you have all fan speeds?
The motor itself should be mounted in the plastic plenum.
My truck has a vacuum operated "outside air-heat" control.
This one lever doesn't feel like it's doing anything because it's only controlling a vacuum port. But I checked this weekend and after patching a cracked vacuum line it works fine.
Perhaps the blend door hinge has broken?
That's not uncommon.
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 40
From: EXTREME southwest CT
I'd first check the fuses, then check for power at the motor plug.
Going to look at the schematic for an '86.
There is a wire-wound resistor in the plenum that acts as a speed control for mine. These commonly burn out, but usually leave you with high speed. (that's why I asked)
Going to look at the schematic for an '86.
There is a wire-wound resistor in the plenum that acts as a speed control for mine. These commonly burn out, but usually leave you with high speed. (that's why I asked)
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New User
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thanks I will check to see if there is power to the switch
then go from there
it snowed last night and is cold
so of course now I fix the heat
I just got all the lights and things on and working
probley should have done the heat first
thanks
then go from there
it snowed last night and is cold
so of course now I fix the heat
I just got all the lights and things on and working
probley should have done the heat first
thanks
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 40
From: EXTREME southwest CT
OK,
So I'm looking @ the schematic in my Haynes manual.
It says fuse #15 should be 30A.
The resistor is 4 wire for a truck w/ A/C, and 3 wire for one without.
Do you see a plug with a red, or pink, board screwed into the engine bay side of your plenum?
So I'm looking @ the schematic in my Haynes manual.
It says fuse #15 should be 30A.
The resistor is 4 wire for a truck w/ A/C, and 3 wire for one without.
Do you see a plug with a red, or pink, board screwed into the engine bay side of your plenum?
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Post Fiend
Joined: Nov 2005
Posts: 7,437
Likes: 4
From: Charles Town, W bygod Va
I just had to replace my blower motor, It is located under the hood on the pass side. Mine was dragging and blowing fuses. Check to see if you have power and ground to the motor, if not check the 30 a fuse. The temp cable on mine is broken too, it moves the lever to adjust temp just towards the centr of the firewall near the blower motor. I have just been setting the temp were I want it under the hood and dealing without adjusting from the cab
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