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1973 - 1979 F-100 & Larger F-Series Trucks Discuss the Dentsides Ford Truck
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78 fan upgrade?

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Old Nov 15, 2021 | 11:00 AM
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78 fan upgrade?

Is there any upgrade for the blower motor in the dentsides? The CJ Jeeps use a Blazer fan motor and it blows away ,pun intended, the factory motor. Just curious if anyone has discovered one. Mine puts out heat just fine........only the fan is very low. It is a 3 speed and the 1st 2 speeds are hardly noticable. Thanks.
 
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Old Nov 15, 2021 | 12:32 PM
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Prime Products 06-0850 Chrome Heavy Duty Fan, Fans - Amazon Canada Prime Products 06-0850 Chrome Heavy Duty Fan, Fans - Amazon Canada

Chrome plated, Heavy Duty, under $60.
The 2-speed model is only $46.
Unsure of any windshield clearance issues, but they are great defrosters on those cold wet mornings.
 
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Old Nov 15, 2021 | 12:51 PM
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Good idea. More interested in one to replace the one inside the heater box though. I have a spare heater box at the house. Maybe it's time to start playing.
 
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Old Nov 15, 2021 | 01:56 PM
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While heater fans do slow down and die, these trucks are more notable for having clogged vents. Have you checked that the whole duct system is clear? Cleaning it may pay off better.
 
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Old Nov 15, 2021 | 02:37 PM
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I can look at it but I just replaced the blower last year. The old one finally gave out. Just curious if anybody had found one that would fit that moved more air.
 
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Old Nov 15, 2021 | 02:51 PM
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Biggest difference I've made on mine is redoing all the ducting. Foam gaskets at all the junctions and sealant at the dash and anywhere I couldn't put a gasket. Night and day difference in output.
 
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Old Nov 16, 2021 | 09:39 AM
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The power supply takes a long path from the battery, ignition switch and fuse box up to heater switch, resistor and motor. If any of these connection points is causing resistance it can slow the motor down.
 
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