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I have a Hayward h400 heater I changed my display bored because It was shot but now it’s displaying code BO but when I try to put it in service mode nothing happens it stays in stand by mode what should I do

Posted by Derrick Joiner on

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J Bloodsworth

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Anonymous

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SOURCE: Hayward H400 heater problem

LO usually indicates low water pressure. Check the pressure in your filter. You may need to backwash. If the filter is to clogged then the water pressure in the heater is so low that it won't activate the pressure switch. While checking the pressure turn the pump off and then on to make sure the pressure gauge is actually working. Also check the pressure coming out of the inlets into the pool. You should be able to tell if you have sufficient water pressure.

Posted on Jan 28, 2009

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Anonymous

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SOURCE: Hayward H250 FDP Pool heater won't stay lite

sounds like a flame sensor.remove ignitor assembly and clean with fine emory cloth or steel wool.when properly cleaned it should feel smooth for entire length of sensor

Posted on Jun 21, 2009

Kieran Ruppert

  • 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

thepool

thepool

  • 78 Answers

SOURCE: Hayward pool heater - p5 code

The code is "PS" for Pressure Switch and means there is insufficient pressure to operate (low flow) or the switch itself is bad.

Posted on Apr 22, 2010

Anonymous

  • 78 Answers

SOURCE: hayward H400 error code bo

This error means "Bypass Operation". On the back of the control module there are some "dip switches". They have an on or off position. Check switch number 2. Make sure it is in the "off" position. The "on" position is for a remote thermostat.

Posted on Jun 29, 2010

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1 Answer

Had a power outage yesterday now heater won't ignite. No error codes.


bo = 'Bypassed Operation'
heater is now controlled via your automation system.
Create a heat call, turn solar off if active.
Heaters should be set to auto on.

Mar 07, 2015 | Hayward Pool Products Hayward Universal...

2 Answers

Hayward h series Bo problem


make sure you have adequate gas pressure

May 17, 2014 | Hayward H-series Electronic Gas Pool...

1 Answer

Hayward Heater H series 400 BTU will not start


This is a normal display when heater is being controlled by a remote thermostat. No service is required. If heater is not being controlled by remote thermostat, change setting by using the MODE key to put the heater into STANDBY. Press and hold the DOWN key and then press and hold the MODE key. HOLD down both keys for 3 seconds until the indication "bo" is removed from the display.
The key to this is DOWN first and then together with MODE, both for 3 seconds.

Make sure the display is not showing "BD".

Jul 06, 2017 | Hayward H Series Pool & Spa Heater 400k...

1 Answer

The CE code is showing on screen


Communication error


If communication between the ignition board and the display board is not established

within 3 s of power-up an error will be displayed. After communication is

established, if it is lost for 30 s, the error will be displayed. The error code will
be cleared upon a valid data exchange between boards.

May 18, 2012 | Hayward H-series Electronic Gas Pool...

1 Answer

I have a hayward 400idl heater that is stuck in stand by mode. any ideas?


Hi
If you have a auto control system like a Aqualink,Aqualogic Put the controller in service than select heat. Check and make sure the service light is not on also. What happens when you press the mode button. If nothing and the button membrain looks good. open the front panel there is a ribbon cable that goes to the display and plugs into a control board in the back. Unplug the cable and plug it back in "Be Careful The Pins bend very easyly. Try the mode button again. Is there any error codes on the display?

Jan 07, 2011 | Hayward H-series Electronic Gas Pool...

3 Answers

Hayward H400 Pool heater will not stay lit


"IF" - Hayward Pool Heater Fails to Ignite: the most common reason for this problem is insufficient gas supply. The Hayward heater LED display will show a diagnostic fault code of "IF" which stands for Ignition Failure. Undetected gas pressure problems if not investigated properly may result in unnecessary replacement and servicing of your Hayward Pool Heater.

Jun 06, 2009 | Hayward H-series Electronic Gas Pool...

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