AC blower issue - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 6 (permalink) Unread 10-10-2019, 01:06 AM Thread Starter
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AC blower issue

Iíve got a 2000 7.3. For some time Iíve noticed air flow from the ac declining, but would still keep the cab relatively cool on a hot day. So Iíve been thinking over time the evaporator coil has been getting clogged as I do work in a very dusty environment, but use recirculate all the time. Today a new problem arose. After idling for a couple hours I noticed that even on max it was barely blowing. As in set on max, but blowing less or equal to low. I have power on all 4 blower speeds and can hear the blower motor increase speed as the switch is turned up yet very little increase in air flow out of the vents. Same results if I switch to defrost or floor. So after dealing with barely any ac all day while sitting on location, I left and a mile or so down the road it was blowing like it was before I parked this morning. Any ideas? Thanks in advance
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post #2 of 6 (permalink) Unread 10-10-2019, 11:29 AM
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Re: AC blower issue

sounds like one of the doors in the system has a failing actuator.

tom
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post #3 of 6 (permalink) Unread 10-11-2019, 08:04 PM
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Re: AC blower issue

Hello and welcome to the forum. Lots of very knowledgeable folks here and all are willing to help. Sounds like Tom is on to something.

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post #4 of 6 (permalink) Unread 10-15-2019, 11:59 PM Thread Starter
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Re: AC blower issue

How would I go about diagnosing this? It only does it after idling for a while and as soon as you get back on the road, it then blows like normal.
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post #5 of 6 (permalink) Unread 10-16-2019, 12:05 AM
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Re: AC blower issue

To clarify, it is normal unless you sit and idle for long periods, then once you are back on the road it's fine?

What is the truck's engine temperature during the idle?
Sounds like a clutch fan, or bad plugged up condenser

Charlie
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post #6 of 6 (permalink) Unread 10-16-2019, 12:33 AM Thread Starter
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Re: AC blower issue

Correct, only while idling for extended periods, but some days it doesnít do it at all. Coolant temp according to factory gauge is normal, oil temp varies with outside temp, but normally 140ish or less. The air I do get is cold, not clutch related. Iíve been down that road before. I get cold air, just very little volume of it.
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