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Old 10-15-2021, 07:16 PM   #1
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Cabin air filter / AC air intake

I have a 98 Winabago adventurer with a chev P30 chassis. The air intake for the dash AC is in the engine compartment and switches to drawing from a air intake at the passengers foot area if placed at MAX AC.

I have found the AC having a hard time overcoming the engine heat, especially if the coach is stopped. This is even if set to MAX.. I think because it still partially pulls air from the engine area and also when the engine stops, the flapper moves back to the intake position from the engine, it does not change until vacuum suction pulls when the engine is started. I have not yet tested… but have put duct tape over the air intake in the engine compartment… and now I will have to run it in MAX..or there will be no air flow. I am hoping this may improve cold AC from the dash. I wish it would default to pulling air from the passenger foot area all the time… If so I would disconnect the vaccine hose.

Is there a cabin air filter on this system?
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Old 10-15-2021, 11:13 PM   #2
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Location: Nacogdoches, TX
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It may not have a cabin air filter, but if it does, it could be in the air intake in the engine compartment. That's where my filter is. It has a narrow vertical cover on it, but you can see the filter when the air intake is open.
Wade & Debby Griffin
2018 Tiffin Allegro Open Road 32SA, Ford F53 24K Chassis
2012 Jeep Liberty
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Old 10-16-2021, 05:07 AM   #3
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Location: Nova Scotia
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There are a couple of other things that can cause this problem.
Heater water bypassing the shutoff valve. Test by clamping off the heater hose.
Loose compressor belt.
Electric rad fan not operating.

Dirty condenser. This is usually stacked together with the rad, oil cooler and transmission cooler. Debris often builds up between them. Try washing them out. Compressed air may help or you may need to separate them for a really good cleaning.
Hope this helps.
Jeff and Annette Smith
04 Glendale Titanium 24E29 Fifth
2011 GMC Diesel 2500 HD
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air, air filter

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