Question about Rheem M206A 206K BTU Pool and Spa Propane Gas Heater

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The display says PRS and the heater does not start

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Thank you for posting your question here on Fixya.com.


That unit will not fire until you resolve the pressure switch issue which is what PRS indicates; either the flow is reduced too low meaning the pump/filter system needs to be thoroughly cleaned or the switch or control board has failed and need to be repaired.


Start with a cleaning of all baskets and filter to see if the light clears and the heater works; if not look at replacing the pressure switch. It is not uncommon for the switches to fail but check it with a meter set to ohms if you can. Power off the heater first and pull one of the wire leads off. Put the probes on the terminals with the pump running and see if you have a circuit. If not, replace it. If the switch tests fine the problem is in the control board and it will need to be replaced.


If this answer does not fix your problem, please comment with additional details prior to rating the answer. You may also contact me thru our website at www.arrowpools.net. Positive feedback is appreciated once your problem is solved!


John

Posted on May 21, 2011

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John

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