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Old 09-24-2021, 04:11 PM   #1
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Holiday Rambler Owners Club
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vacuum pump noise

'05 HR Scepter
electric vacuum pump making a vibration? noise. Hubby replaced the pump but is still making noise. Will shut off for about 5 seconds them start again. Anyone have any suggestions?

Thanks.
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Old 09-24-2021, 06:11 PM   #2
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Ok , a short cycle like that indicates the dash air conditioning control system needs to be checked for vacuum leaks .

Follow the vacuum hose from the pump to the reservoir ( usually a softball size black plastic unit ) disconnect the hose from the inlet and cap the hose ; If the pump no longer cycles , reconnect the hose and remove the outlet side hose and plug the fitting on the reservoir . If the pump no longer cycles you have to go to the control head in the dash and plug the supply there , if the cycling stops then you're off to individual actuators looking for a leak in the line or at an actuator it's self.
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