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My raypak pool heater does not work. it gives an error I LO. What does that mean?

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You have one leg of the 220volt power off line, it's a breaker or a fuse, or just a broken wire to the panel.

Posted on Jul 11, 2009


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Say "lo back! Sorry about that. Can you give me a little more info about indications? Has the filter been cleaned lately? A dirty filter often will restrict the water flow enough to where the heater thinks that the pump is not running.
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My raypak heater has error code LO. What does that mean

This is in the limit string. This is the string of safty switches in the heater. (thermostat, highlimits, rollout switch and pressure switch) The pressure switch is the most common problem. If the water flow get's to be too little so the water inside the heater is going to overheat than this will shut the heater down. This can be caused if your heater by-pass is to far open and letting water go by the heater. The most common problem is clogged baskets or a dirty filter. Other than this you can follow the flow chart in your manuel to find the source of the problem but if it just started without obvious cause this would be my bet.
I hope this helped and good luck.

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Raypak pool heater RP2100 error message CLK

you are in fireman switch mode,which means pool timer is ready to shut down pump. clk shuts down heater approx 15 minutes before pump shuts down. this lets heater cool down before pump shuts off.

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