Question about Hayward 116k HeatPro Heat Pump HP3100

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Hayward pool heater - p5 code

My hayward heatpro pool heater is displaying a P5 code. what does this mean?

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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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It means there is none or insufficient pressure to operate. If your pump is on, try cleaning the filter. That worked for me.

Posted on Dec 28, 2012

  • luis_cabrera Dec 28, 2012

    It means there is none or insufficient pressure to operate. If your pump is on, try cleaning the filter. That worked for me.

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1 Answer

What does p5 on display mean


Thank you for posting your question here on Fixya.com.


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 www.arrowpools.net. Positive feedback is appreciated once your problem is solved!


John

Feb 22, 2011 | Hayward Pool & Spa

1 Answer

I have a hayward heatpro model hp2100. the heater will run and heat the pool for a while then shuts down displaying LP on the digital screen, after a period of time it will clear the LP and have running...


LP is an error message refering to the low pressure switch. For more information about it please refer to your owner's manual here. If you decide to persue attempting to repair it yourself and need further assistance, please reply to this post with a new comment or start a new post with your specific question(s).

John

Feb 01, 2011 | Hayward Hp2100 Digital Heat Pro Heater...

1 Answer

OP error code. What is wrong with my Hayward pool


OP is the error code for a faulty Temperature Sensor. Try replacing the Temperature Sensor. I have seen many of these units have the wires chewed up by mice, etc., so you may want to check the wiring for any damage.

I’m happy to help further over the phone at https://www.6ya.com/expert/jeremy_69f3cc28d95bf514

Jul 03, 2010 | Hayward 116k BTU HeatPro Digital Heat Pump...

2 Answers

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


You heat pump is actually displaying "PS" for Pressure Switch. Either there is not enough water flow or the switch could be bad. If you have a sand filter, put the filter head in the "bypass" mode and try again. If the heater works, filter problem. If not, heater problem. Instruction book found here: http://www.haywardnet.com/products/Manuals/pdfs/Manual122.pdf

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

1 Answer

Hayward pool heater wont stay lit


Follow the troubleshooting guide on page 36 of this owners manual. It will walk you through problem solving... http://www.haywardnet.com/products/Manuals/pdfs/Manual285.pdf

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1 Answer

Heat pump will not start


Could be a firmware issue and require a new mother board. Unfortunately, you probably have done all you can on your own. Time to call the local HVAC service person...

May 03, 2009 | Hayward Heatpro 81k Btu Swimming Pool Heat...

1 Answer

LP (low pressure fault) is on screen.


Low pressure is usually a dirty filter ob basket. If you have a by-pass on the plumbing you can shut this down a little to get more flow through the heater. Or you may have a clog in your pump impeller. Hope this helps.

Mar 12, 2009 | Water Warehouse Hayward HeatPro In-ground...

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