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Hayward pool heater p5


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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


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My Hayword Heat Pro pool heater has been running ok for many hours, then, without warning or interference by me, the intake hose on the filter blows off. I have redirected water flow to avoid heater and...

I am guessing the pressure setting is not what is should be. Either your pool is larger than the heater can handle or the settings need to be readjusted. What I guess is happening is the heater is taking in more than it can handle. This causes pressure build up and will pop out the filter.

Elisa Jed '

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What does p5 on display mean

Thank you for posting your question here on

I believe your code is PS, not P5, and it means the pressure switch is open.

That unit will not fire until you resolve the pressure switch issue; either the flow is reduced too low and the pump/filter system needs to be thoroughly cleaned or the switch or control board has failed and need to be repaired.

Start with a cleaning of all baskets and filter to see if the light clears and the heater works; if not look at replacing the pressure switch. It is not uncommon for the switches to fail but check it with a meter set to ohms if you can. Power off the heater first and pull one of the wire leads off. Put the probes on the terminals with the pump running and see if you have a circuit. If not, replace it. If the switch tests fine the problem is in the control board and it will need to be replaced.

If this answer does not fix your problem, please comment with additional details prior to rating the answer. You may also contact me thru our website at Positive feedback is appreciated once your problem is solved!


Feb 22, 2011 | Hayward Pool & Spa

1 Answer

CE error code on hayward pool heater

CE= Communication Error between Control Module
and Display Interface Assembly
1. Disconnect and then reconnect power to heater.
2. Check for faulty wiring or connection.
Inspect Display Interface Wiring. Ensure Display Interface Plug is securely attached to Control Module. .
3. Control Module and/or Display Interface Assembly
are defective.Replace Control Module and/or Display Interface Assembly.
Here is a linkt oH aywardmanuals:

Jul 04, 2010 | Hayward 250kbtu Ng Pool Heater - Inground

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My hayward pool heater is displaying P5 and the fan is not moving. what does this mean?

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Apr 08, 2010 | Hayward 116k HeatPro Heat Pump HP3100

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I have a Hayward pool heater. It's about 5 years

would not suggest trying to manually light,its an electronic ign model so you may damage some wires with an open flame.try powering off then turning back on and see if display retuns to normal

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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.

May 26, 2009 | Hayward 116k HeatPro Heat Pump HP3100

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