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Old 05-05-2019, 06:04 AM   #1
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Dash heater / AC fan blower

Was wondering if someone changed their heater / AC fan blower motor or cage to get a higher volume flow. I find with either heat or AC it would be better if I had more air blowing out.
Any info would be appreciated
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Old 05-05-2019, 10:15 PM   #2
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Quote:
Originally Posted by High Ball View Post
Was wondering if someone changed their heater / AC fan blower motor or cage to get a higher volume flow. I find with either heat or AC it would be better if I had more air blowing out.
Any info would be appreciated

Our Expedition had a similar problem and as I type this the technicians finally discovered the problem - a circuit board in the dash was partially damaged due to an excessive under-voltage condition. The under-voltage condition caused a over-amperage condition and the over amperage condition damaged the radio, AC compressor clutch, AC condenser fan motor, several fuses and at least two relays.


The root of the problem was the grossly underpowered OEM engine driven alternator that was only rated for 130 amps.


My advice for anyone with a motorhome - have at least a 240 amp alternator.
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Old 05-06-2019, 12:07 PM   #3
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Roger , although your coach is built on a Freightliner chassis , Freightliner didn't supply the dash heater A/C unit , probably only the engine mounted A/C compressor and a few of the hoses.
So questions about the dash unit should be posted in the " Owners Forums " so other members with your same brand of RV can see the question and reply.
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Old 05-07-2019, 11:12 AM   #4
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Lack of air maybe to a air plugged heater core. Happened to me on a older car. Much dirt on outside of fins.
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Old 05-07-2019, 12:13 PM   #5
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Do you get more air flow when using the Recirculating mode? If so it may be a damper door not fully operating

On mine I get twice the air volume when using the RM
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Old 05-07-2019, 01:15 PM   #6
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Thanks for the replies. I will check these next time I go to MH
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