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poolofficial, Business owner
Category: Pool and Spa
Satisfied Customers: 135
Experience:  CPO, Service & repairs over 16 years
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I've been working on a Jandy Lt 400 natural, initially replaced

Customer Question

I've been working on a Jandy Lt 400 natural, initially replaced flame sensor, heater ran good. Customer called again an I replaced the internal bypass valve. Heater still continues to fire and then cycles
Submitted: 1 year ago.
Category: Pool and Spa
Customer: replied 1 year ago.
All I can think of is the limit switches, but heater will run for varied time amounts before shutting down and recycling.
Expert:  poolofficial replied 1 year ago.
Sounds like you have a faulty high limit switch.

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