Question about Raypak Rp2100 Pool & Spa Heater Lonox 407k Btu Natural Gas Polymer Header Digital Rp407aenc
PRS means that the heater is not sensing pressure in the plumbing.
Make sure that the pump basket is clean.
Make sure pump is flowing freely as it should (no blocked skimmers or returns)
Make sure filter pressure is where it should be. If this is a cartridge filter, remove and clean the cartridges. If its a sand filter or a DE filter just do a long backwash.
Make sure any heater bypasses are closed.
If you know the water is flowing freely, and you still see this code, you must replace the pressure switch. It should cost about $35 for the part at a retail store. It is located on the top side panel opposite of the water connections. It looks like a round disk screwed into the header, with two wires coming from it. Just unscrew the old part, and using teflon tape, screw in the new part.
Connect wires, and restart the heater. It does not matter in which place you put the wires.
Posted on Dec 31, 2010
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Posted on Jan 02, 2017
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