Question about RTO Balboa, Heater w/Pressure Switch

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Balboa Spa "LF" light flashing on Spa side Control Panel

We have an older Balboa Spa and have a "FL" flashing on the Control Panel, low flow thru both of the Pumps and the Heater will not come on. We have pulled the heating element and cleaned out as much of the lines as we can. Could the Pressure Switch be bad causing the Low Flow situation?

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  • 305 Answers

Yes it is possible

Posted on Dec 05, 2013

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Posted on Jan 02, 2017

adamh294
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SOURCE: just fitted 3.0 balboa heater

You can test the pressure switch using a multimeter. When the system is running (pumping water) the pressure switch should have voltage at both terminals, if the pump is on and there is only voltage on 1 terminal, you need a new pressure switch.

Posted on Apr 05, 2011

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