Question about Hayward H-series Electronic Gas Pool Heater H400

1 Answer

Po code on hayward h400idl2

UNIT INITIALLY FIRES THEN SHUTS OFF AFTER 15 SEC. FLASHES BOTH PO AND AO CODES. CODE LABEL IS TOO BADLY WEATHERED TO READ.

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  • Hayward Master
  • 3,543 Answers

Check flame sensor

Posted on Mar 19, 2016

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 8 Answers

SOURCE: I just installed a new Hayward H400FDN and it will not stay lit.

I had the same issue...you don't have enough gas pressure.

Posted on May 12, 2009

  • 990 Answers

SOURCE: Hayward H400 heater won't light and service light

This is a code for what is called a prover switch. What it is a circut for the air pressures. Depending on model you can have one or two of these. Their will always be one for the exaust perssure and this will often be the culpret. If the sensor is good a sooted exchanger, rat nests on the exchanger or in the exaust can cause this. If you have a second switch it will be for burner air pressure and you will look for the same problems only inside the burner cabnet. Good luck, I'm sorry I can't be more help. But at least you know to look to the vent system.

Posted on Dec 29, 2009

  • 4 Answers

SOURCE: I had code AO displayed on my hayward H250IDE. I

Check your wiring again on all the safety devices - Water pressure switch and both Hi- limits in the header.

Posted on Mar 01, 2010

Testimonial: "Thank you very much for the assit. I did find a kink in the vent safety switch. Thanks again."

john224
  • 1378 Answers

SOURCE: My hayward heater fires up and then turns off

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

The basics are covered in this excerpt from your owner’s manual. If you need direction or additional information about these steps please post your specific questions.

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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 Apr 13, 2010

  • 64 Answers

SOURCE: H Series Pool & Spa Heater 400k Btu Propane Gas Milivolt Ignition H400p1: how do i fix the AO code on my hayward heater?...

AO will apply to your blower, blower tubing, or blower vacuum switch. You need to check these items.

Posted on May 20, 2010

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\Thanks.

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PO 134 = 02 SENSOR CIRCUIT NO ACTIVITY DETECTED (BANK 1 SENSOR1)
PO 153 =02 SENSOR CIRCUIT SLOW RESPONSE (BANK 2 SENSOR 1)
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