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AO CODE AND BLOWER SEEMS TO BE SLOW

New hayward 250 heater ao code preventing ignition blower seems to be a little slow. try to jump out the vacuum switch but got a io code and still not ignition blower bad or low voltage if fan not at correct speed ignitor will not glow

Posted by Gerard Pisano on

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Anonymous

  • 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."

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Daniel S

Daniel Scott

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SOURCE: My Hayward H400 pool heater

Hi

AO is prover switch open error and is displayed if the blower prover switch opens unexpectedly during operation the control will shut down and attempt to re-light. If the switch does not close after the blower starts the control will go into lockout with the blower running. Replacing the vacuum switch usually solves the issue however, it is better to replace both the parts. Automatic reset is immediate after error is corrected. Hope this helps....please post back for further assistance.

Daniel

Posted on Sep 16, 2011

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2 Answers

I have a Hayward H250 that wont ignite. When I set mode to to pool the blower comes on but nothing kicks in. then i get an error code of AO.


ErrorAO means BlowerVacuum Switch Open. If the blower prover switch does notclose after the blower starts the control will stop the ignition trial go intolockout. The blower will continue to run. Automatic reset is immediate afterthe switch closes. So you need to check this.

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Ao error message in Hayward heaters


You didn't indicate exatctly which model you have. But on most the AO error code is :Blower vacuum switch
open error If the blower prover switch does not close after the blower starts the control will
stop the ignition trial go into lockout. The blower will continue to run. Automatic reset is immediate after the switch closes.Check to be sure combustion blower starts
If you don't have your manual you can download one for your exact model at : www.haywardnet.com

Jul 29, 2010 | Hayward H Series Pool & Spa Heater 400k...

1 Answer

I have an ao code and have replaced the vaccum switch and blower vaccum switch and still getting the ao code


Check the tubing going from the blower to the blower vacuum switch. If there are any cracks, missing, or cut, it will give the same code. Rodents like to chew on this tube. Also, if the blower is not coming on at all, then you will get the same code, and the problem is not with the switch, it is likely in the blower.

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2 Answers

Spa heater will not ignite. Shows "AO" code.


You need to check and see if you have enough gas supply to run the heater. Older heaters would run on a small gas supply but forced draft are hinkey about how much gas they get. Sometimes this is a gas line size problem but more often than not it will be a gas meter problem. On the face plate of your meter their is a number that tells the size. With a 250 and other appliences in the house you will want a 350 or bigger. The good news is the gas company will upsize this for nothing. If they are supplying more gas your buying more gas. It could be other things but this is the first thing to look into.

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1 Answer

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.

Feb 19, 2010 | Hayward H Series Pool & Spa Heater 400k...

1 Answer

AO error


This error is produced when the blower prover switch does not close after the blower starts, the control will stop the ignition and go into lockout. Automatic reset is immediate after the blower prover switch closes.

If you keep having this problem, contact a reputable service company, especially if it's under warranty.

The link to the owners manual is below, it references fault codes, etc..

Hope this helps.

http://74.125.95.132/search?q=cache:4mAdY7bLfoQJ:www.haywardnet.com/products/Manuals/pdfs/Manual227.pdf+hayward+AO+error&cd=7&hl=en&ct=clnk&gl=us

Sep 16, 2009 | Hayward H Series Pool & Spa Heater 400k...

1 Answer

AO error code


I would have to agree with you concerning the control module.

Jul 31, 2009 | Hayward H Series Pool & Spa Heater 400k...

1 Answer

Code AO is on display. Went throught the


if blower comes on it is calling for heat. i would look at ignitor.it could also be vacuum switch(tube goes to it from blower)however they rarely fail.let me know

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