Question about Hayward Pool & Spa
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
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
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
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
Tips for a great answer:
Mar 07, 2015 | Hayward Pool Products Hayward Universal...
Jul 06, 2017 | Hayward H Series Pool & Spa Heater 400k...
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...
Jan 07, 2011 | Hayward H-series Electronic Gas Pool...
Jun 06, 2009 | Hayward H-series Electronic Gas Pool...
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