Question about Jandy Laars Lt 250,000 Btu Heater

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The pool filter won't turn on and the pressure switch on the heater is blinking

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  • 1,378 Answers

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


There is not enough system pressure to close the heaters pressure switch so the heater will not fire or it may be the switch itself is bad but you should first check for system problems that will cause this light to come on.

Assuming your pump is on and any valves in your pipes are set correctly it means something is restricting water flow too much and needs to be cleaned to fix your flow rate and allow the heater to fire.

Start at the skimmer(s) baskets and then the pump strainer basket and finally clean your filter. If it is a sand filter backwash the thoroughly; if it's a cartridge or DE filter, clean it according to your manufacturer's direction. In some cases cleaning a cartridge filter will no longer satisfy heater pressure requirements meaning you will need to replace the element.


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!


John

Posted on Jan 01, 2011

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