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Ticking noise

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with no more information, I 2nd Five's reply.  Details of  when, where, engine running?, A/C running,  etc. would really help with  answering.

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  On 2/7/2024 at 12:45 AM, rayin said:

with no more information, I 2nd Five's reply.  Details of  when, where, engine running?, A/C running,  etc. would really help with  answering.

The coach is I storage 6 new agm batteries installed 6 weeks ago. Started coach and let it and gen run. 1 hr for the gen while I watch tv. 3 days ago I started hearing the  humming sound when I shut engine down. 3 day later I go back it’s still humming the kicker is both battery disconnect switches were in the off positions 

SMH

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A humming sound vs a ticking sound in  first post; humm. I sometimes hear a sound like a small electric motor running (a hum) after turning off my engine; I suspect my sound is coming from the 12v vacuum pump motor for the heat/air switches under the dash still running, but haven't ever had the opportunity to fully investigate. The last thing that happens after turning off the ignition key is, the heater/air controls auto-switch door positions to defrost.

I think this pdf has the explanation buried somewhere within: https://newpar.newmarcorp.com/instance1Env99NEWMAR/html/images/SS2013EVEQUILTRAIN.pdf

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