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Old 05-08-2016, 05:09 PM   #1
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Santabobswife's Avatar
Join Date: Jun 2015
Location: Jackson, GA
Posts: 285
Power or surge supressor

Not sure exactly how to phrase this question. Problem seems to be something to do with amperage coming into the motorhome. First problem. Refrigerator is running hotter than it should. Second problem. Air-conditioner comes on and then shuts off. Sometimes the breaker trips sometimes it does not. We have never used a surge suppressor previously and never had any problems. However, we purchased a surge suppressor and connected it and now seem to be having problems with being able to run things in their motorhome . Any suggestions. Thank you.


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Old 05-08-2016, 07:52 PM   #2
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Join Date: May 2014
Location: Waterloo Region
Posts: 652
What brand and model of device? There's a big difference between a surge suppressor and a power management system. With a power management system, there is usually a startup delay and it will cut the power for over or under voltage. If you don't have the problem with the unit out of the circuit then it is defective.

The reason your A/C is cutting out is because the compressor motor is drawing too much current to try to compensate for the undervoltage. This causes the motor to overheat and possibly go into thermal protection (if the overcurrent doesn't trip a breaker first). Assuming the fridge is a domestic (i.e. home-style, AC-only) its motor is likely overheating for the same reason except that the fridge motor is usually a much smaller fraction of the circuit capacity so its unlikely to trip a breaker.

You need to fix the undervoltage problem (stop using the device if that solves the problem) or you're going to let the magic smoke out of some of your appliances.
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