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Posted on Sep 14, 2011
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The VAC switch is probably no more good on my minimax pool heater. I have a new one but can't find where it is located. Any suggestions?

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  • Posted on Sep 14, 2011
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The air switch is located inside the front heater cabinet on the right hand side. You must remove both sheet metal boxes on the right to access this part. Just follow the rubber tube into the lower metal box.

NOTE: on these units, its much more common to see the rubber tubing fail. Not the actual air switch. To check the tubing, remove from the air switch, then remove the upper right panel to access the fan area. Follow the tubing into the fan casing and and remove. Check to make sure rubber is not brittle, crackes, or broken. Replace if necessary.

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Line side for a couple of reasons: First, there are more safety switches than just the pressure switch to ensure the unit shuts off prior to damaging itself. Second, and probably more importantly, removing power from the unit each time the time clock turns it off will keep erasing the temperature settings you enter. After a while that gets old for most people. Coincidentally, when pressure switched fail, they fail as open making the heater inoperable. While they could conceivably short closed and cause the situation you fear, I have never seen that in 20 years of servicing heaters.

If this answer does not fix your problem, please comment with additional details prior to rating the answer. Positive feedback is appreciated once your problem is solved!

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