Inground swimming pool heater keeps shutting down

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Old 05-15-15, 06:08 AM
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Inground swimming pool heater keeps shutting down

My inground swimming pool heater keeps shutting down. Wondering if the Thermal Coupler could be causing the problem. The unit stays on for a short time and shuts itself off. Any Ideas?

I did clean the burners and pilot light prior to this problem.

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Old 05-15-15, 06:27 AM
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It would help if you gave us a make & model. Also have you searched that model on Google?
 
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Old 05-15-15, 06:45 AM
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Sorry - It is a Hayward 150 thousand BTU
 
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Old 05-15-15, 07:05 AM
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I did a quick search on Google. Do you see an error code on the screen? If so what is it?

Secondly, here's a quote from another site:

Most gas heater will shut off at low GPM levels (20-40) to keep the heater cores from overheating - 20 for 200 BTUs, 40 for 400 BTUs. Depending on your pool system you might get these GPM levels at the low speed but generally these heaters must be run at the motor's high speed.
 
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Old 05-15-15, 10:48 AM
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So it's a Hayward H-150 ? No letters in there ?
I'm also guessing standing pilot light.
 
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Old 05-15-15, 02:37 PM
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Wondering if the Thermal Coupler could be causing the problem
If it is a standing pilot model, and the pilot is staying lit, but the main burner is not, then it is not the THERMOCOUPLE ( not " thermal coupler " ).

I just breezed through the manual.

If you have a standing pilot, you most likely have a MILLIVOLT system, in which case you do not have a thermoCOUPLE, but rather a thermoPILE.

If the pilot stays lit, but the main burners go out, the thermoPILE is NOT your problem.

There are a number of limit switches inside the unit. If the pilot is staying lit, but the main burners are going out, then one of those switches could be faulty...

OR, as Pulpo has pointed out, the FLOW could be wrong, and there could be a number of reasons for that, all of which are outside the scope of this forum.
 
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