Question about Hayward H Series Pool & Spa Heater 400k Btu Propane Gas Milivolt Ignition H400p1

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Hayward, blower vacuum switch open - Hayward H Series Pool & Spa Heater 400k Btu Propane Gas Milivolt Ignition H400p1

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Posted on Jan 02, 2017

adamh294
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SOURCE: Hayward GAS HEATER KEEPS GIVING ERROR AO blower

This means that either the switch is bad, the wiring is corroded, the fan is not working, or the air switch tubing is broken or cracked. Follow the air switch tubing all the way to the end, remove it and check for cracks. This is the most common. Also check wiring connections for breaks, or corrosion.
If all looks well, replace the air switch.
Also, before any of this, make sure the fan is coming on at start-up.

Posted on Jan 16, 2011

  • 990 Answers

SOURCE: Error code A0

Just left of center inside the top of the front cabnit.(where the hayward label is) It's about 2 1/2" around and has two small hoses coming from it.

Posted on Jul 14, 2010

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1 Answer

AO error code on 250k btu hayward pool heater


Dear ,

Please try the below solutions,

Solution 1:
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
Solution 2:
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. Automatic reset is immediate after error is corrected
Solution 3:
If the blower prover switch opens during the postpurge cycle (heater is not fir- ing) the control will display the error code. The post-purge cycle will be com- pleted once the blower prover switch close
Regards,
Samy

Aug 10, 2014 | Hayward Pool & Spa

1 Answer

The tube or hose that connects my hayward spa part # IDXLBWR1930 is broken. I am getting an AO error.


This tube connects between the blower and a vacuum or pressure switch. If the tube is broken the switch can't detect whether the blower is working. If you fix the tube then the system will continue its sequence and if it finds no more faults it should ignite and the heater can heat.

Aug 06, 2011 | Hayward series Heater Combustion Blower...

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.

Jun 14, 2011 | Hayward H Series Electronic Ignition...

2 Answers

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

Error code A0


Just left of center inside the top of the front cabnit.(where the hayward label is) It's about 2 1/2" around and has two small hoses coming from it.

Jul 14, 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.

May 19, 2010 | Hayward H-series Electronic Gas Pool...

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