Heater problems
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Senior User
Joined: Mar 2006
Posts: 205
Likes: 1
From: Moscow ID
Heater problems
The truck is a 1977 F-150.
The heater in the truck is not blowing. The heater works (I can put my hand under the dash and there is hot air coming out) but the blower doesn't come on. I have replaced the blower switch and the heater fuse. Anything else I should check before I replace the blower motor?
The heater in the truck is not blowing. The heater works (I can put my hand under the dash and there is hot air coming out) but the blower doesn't come on. I have replaced the blower switch and the heater fuse. Anything else I should check before I replace the blower motor?
More Turbo
Joined: Apr 2004
Posts: 736
Likes: 3
From: South East, Michigan
The blower motor resistor is mounted in the heater box under the dash on the right side (pass) foot well. It looks like this (for a non-A/C truck): http://blueovaltruckparts.com/catalo...4373b70991d3d6
If you have a truck with A/C the resistor will be located under the hood on the right side in the A/C box and looks like this: https://www.ford-trucks.com/user_gal...135530&width=0 , https://www.ford-trucks.com/user_gal...135531&width=0 I'm not sure where to find a new one for a A/C truck, I have not seen one yet. This part get's rusted and nasty due to being mounted in the heater duct and getting damp. Remove and inspect, replace as needed. -Ed
If you have a truck with A/C the resistor will be located under the hood on the right side in the A/C box and looks like this: https://www.ford-trucks.com/user_gal...135530&width=0 , https://www.ford-trucks.com/user_gal...135531&width=0 I'm not sure where to find a new one for a A/C truck, I have not seen one yet. This part get's rusted and nasty due to being mounted in the heater duct and getting damp. Remove and inspect, replace as needed. -Ed
Thread Starter
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Senior User
Joined: Mar 2006
Posts: 205
Likes: 1
From: Moscow ID
Originally Posted by 81-F-150-Explorer
Does the truck have Factory A/C?
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 784
From: Simi Valley, CA
Originally Posted by sirkt
Sorry, Yes the truck does have factory A/C. I will try to bypass the resistor on Friday and get back to you all.
This resistor fits all 1973 thru 1979 F series trucks.
Try Green Sales in Cincinnati Ohio, if it is no longer available from FoMoCo.
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