20 Most Recent Hayward H-Series 200k BTU Millivolt Heater - Natural Gas Questions & Answers

you may need to bleed the line to get fresh gas to the unit, you can use soapy water to check, that the fitting leak free, after bleeding at the block.

Hayward H-Series... | Answered on Nov 20, 2013

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

First you will need to get a hold of a digital or analog multimeter and set it for the lowest range of Ohms you can. Your safety circuit is a string of several switches all strung together in a row with the gas valve at the end and the beginning of said string. Any one switch being open or a bad connection anywhere in the circuit and the heater will not fire.

You task is to remove one end of the circuit from the valves TH or TT post and put one end of you meter on that wire and the other end on the TH/PP terminal. It will likely read infinite resistance. Leave one meter lead where it is and remove the other. Follow the circuit from the connected lead up to the first switch. Check continuity from the lead left connected to both sides of the switch. If there is continuity to both sides the switch is fine. Keep moving from switch to switch until you find the bad switch or connection. There may be more than one. When the circuit is working properly and there is nothing within the heater to cause it to shut off you should have 5 ohms or less across the entire circuit. Once you get the reading to that level the heater will work as it should

If you are not familiar with the process I described you would be better served hiring a pool technician to perform this repair as you can cause significant damage to the heater if you do not repair it properly.

If this answer does not fix your problem, please comment with additional details prior to rating the answer. Positive feedback is appreciated once your problem is solved!


Hayward H-Series... | Answered on Jun 06, 2011

Close all pool drain valves, also all return valves. This will stop any water being sucked out of pool.

Hayward H-Series... | Answered on Jul 25, 2010

You didn't say what terminals you jumped, but I assume it's the flow switch, or it could be the thermostat. The flow switch is located on the piping inside the heater. This flow switch is very important because if you didn't have water flowing through the heater it would oveheat. These do go bad or sometimes just get stuck depending on what type they are. If it's the thermostat, mounted on the front pane you're jumping, then either it or it's expansion bulb is faulty. GOOD LUCK Who needs a heater in JULY?

Hayward H-Series... | Answered on Jul 05, 2010

This is a fault in the control system...prob the high limit switch or pressure valve



Hayward H-Series... | Answered on Jun 05, 2010


I think you must be mistaken about your heater being a millivolt heater. They have not mfg these heaters for some time. And they probably would not give you an SF error. If you have an SF error, it is a newer model with a digital board. Millivolts usually have two analog temperature dials on them and no digital readouts. That should be the part. HTH

Hayward H-Series... | Answered on May 20, 2010

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Hayward H-Series... | Answered on May 15, 2010

Code "CE" stands for communication error and describes a fault between the mother board and the display. I doubt it's the relay causing it though...

Hayward H-Series... | Answered on Apr 23, 2010

check the conection to your firemans switch. The firemans switch normally overides manual controls and from there you hook up your external controls

Hayward H-Series... | Answered on Apr 11, 2010

Hi, F1 error shows that the failure of board occured. Please replace control board (also called ERC) to fix this problem!
Thanks! mannu_rakesh

Hayward H-Series... | Answered on Aug 29, 2009

are you sure the code isnt FO , which would indicate flame sensor failure.usually can be solved by removing and cleaning fl sensor with fine emory cloth.since htr is calling for heat ,pressure switch does not need adjusting

Hayward H-Series... | Answered on Jul 23, 2009

take it to a pool service center and get it inspected

Hayward H-Series... | Answered on Jun 22, 2009

its trying to start check voltage to fan if ok bad fan motor if no check safety circuit

Hayward Pool &... | Answered on Dec 19, 2020

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