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Old 03-23-2021, 08:23 PM   #1
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A/C blows through defroster and a little through the dash vents

I notice my 2006 holiday Rambler ambassador the AC was bwing through the vent and The dash a little.I Notice the overhead defroster was blowing at the top I was wondering if that could be the Vacuum Pod. I'm at a loss I looked at Least 4 hours.
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Old 03-23-2021, 08:37 PM   #2
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Not familiar with your rig but "default" position for vacuum mixing/blending doors is defrost for most vehicles....Assuming a DP, you have a vacuum pump under dash or in front of bulkhead. So vac pump is bad, eg, pump doesn't run;, loose hose connection, eg, pump runs all the time; or bad control head in dash [heater/cooler knobs/switches].
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Old 03-23-2021, 08:42 PM   #3
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Look for a cracked vacuum hose between the control switch and the vacuum pod under the dash.
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Old 03-24-2021, 11:46 AM   #4
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Ditto, look for a cracked or loose vacuum hose.
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Old 03-24-2021, 05:20 PM   #5
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Mine has vacuum inducer/generator from air pressure / flow and vacuum ball/tank looks form 70-80s GM cars. I believe there is a solenoid on air side as well. Notorious for cracking hoses at the cone shaped fittings on ball.
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dash, vent

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