20 Most Recent Hayward H Series Pool & Spa Heater 200k Btu Propane Gas Milivolt Ignition H200p1 Questions & Answers

there are no filters in these units. there is a thermostat, low limit switches, high limit switches, pressure switch (1-5lbs), fireman switch etc. because it is a propane unit, fires and runs, i would suggest checking the supply pressure for the propane. if there is less than 30lbs in the tank, the system may not run properly. if it was plumbed with the wrong size supply pipe, that could be an issue.

Hayward H Series... | Answered on Dec 20, 2015

there are a few things you can check. make sure you have a good fuel supply. make sure the pilot light is lit. (just because the pilot is on doesnt mean you have good fuel supply). the pilot may be out of adjustment from the burner rail. the igniting burner rail may be dirty or blocked

Hayward H Series... | Answered on Aug 13, 2014

all the parts needed will be in the kit. usually, its the control valve and the jets that get replaced. my manual shows its the same part all units. HAXCNK0002

Hayward H Series... | Answered on Aug 12, 2014

I used to be able to get it through my supplier but the link is now dead and shows product not available. I am sure you can get this through Hayward direct. The last kit I bought was around $200 (my cost, not retail). As for a used kit, I seriously doubt that is an option.

Hayward H Series... | Answered on Aug 12, 2014

Most any HVAC technician should be able to fix that or a pool supply company will often have techs that work on those...


Hayward H Series... | Answered on Apr 15, 2011

This will one or more things (1). You will need a manometer to check the gas pressure be sure it is at 11 inches of water collom. (27 inches in 1 PSI) at the back of the gas valve. (2) make sure you have good water flow. If you have an external by-pass this should be 80-90% closed. In the water manifold you will have an internal by-pass assembly this fine tunes the water you control with the external valve. (3) make sure you don't have any derbs around the base of the heater that will block air flow. Also be sure that your heater is away from any wall or has a draft hood.
Any one or more of these things will cause sooting. When you find the culpret and fix then you will need to clean and desoot the heater. Also to avoide this in the future you should have the heater serviced every year before you put it into service.
If you do this yourself be sure to use a plastic brush and not a wire brush as any little spark with the soot can cause an explosion.
This might be one you want to get a repairman involved with and be sure he or she is a profesional.

Hayward H Series... | Answered on Sep 04, 2010

I read this blog a customer on Amazon.com wrote. He had the same problem twice:
Unfortunately for me the unit had broken twice since May 08,
The first time it wouldn't fire up then shut off.
It took weeks to get a diagnosis.
Pool guy said he diagnosed it as an igniter & ordered parts & the parts never showed. After 4 more weeks of not having a heater I called a warranty center and the factory repairman came out. The guy literally replaced 5-6 different components costing upwards of 100 dollars each- over the course of half a day looking for the magic combo that would make it work.

The broken part was the very last thing that could have broken - the gas block. Im still trying to figure out what could even go wrong with a solid looking block of metal.

Access to the inside is a breeze and thats a good thing. Each panel has basically 4 bolts holding the panel on. It is easy to get to the components, and the system has onboard diagnostics but its hard to actually nail down problems as the on board diagnostics dont seem to be able to pinpoint issues really well as each problem required multiple investigations.

A month ago it started firing up and clicking off. Another multi- diagnostic problem. My pool guys diagnosed an igniter - again.
Another factory guy came out and traced the problem to a stuck internal thermostat. After replacing the internal t-stat the service guy traced its sticking to the water chemistry being "off" and showed me a corroded t-stat.

My chlorinator handles chlorine and I measure Ph weekly- if this is true one can NEVER let chemistry be off for any amount of time? That just isnt how pools work, all chemistry is a bounce bewteen a few point on each end measurement. - Or does this thing have a run of bad parts?

So Im building a love hate relationship with this part - (like the Miele blue moon vaccum in another review) I love it when it runs, but it doesn't seem to run reliably.
The unit also has a gas shut-off valve that operates when the flame goes out, so the thermocouple (flame sensor) could be malfunctioning.

Hayward H Series... | Answered on Jul 03, 2010

This could very well be your on off switch, It is hard to say without more info. If this is a milivolt heater it tases very little restance to keep the heater from working. What your calling a folw switch is a presure switch. If you don't have enough water pressure (good flow) the heater won't start. This is part of the saftey circut. If you adjust this just right you can get the heater to run even with the pump off, making it possible to burn a hole straight through the heater and maybe burn the house down. The only reason their is an adjustment on this is so it can be adjusted for a below water level instlation so this same problem does not occur. It should only be adjusted by a profectional.

Hayward H Series... | Answered on Dec 10, 2009

Make sure your gas is turned on and the gas valve inside the heater is set to on. If the heater has not been used in a while, turn the gas valve in the heater to the off position for 5-10 minutes then try again. There may be air in the line if the heater has not been used in a while. If that does not work I would call a service tech...

Hayward H Series... | Answered on Sep 15, 2009

flame sensor is probably dirty.remove and clean with fine steel wool.it is located near bottom of burner near ignitor

Hayward H Series... | Answered on Aug 12, 2009

Yes it does. Flame rectification is carried back through the ignitor assembly ground. Be sure all the points of contact are rust free between the ignitor assembly and the chassis.

Hayward H Series... | Answered on Aug 10, 2009

The p in the model means propane and you should also see a sticker on the gas valve that also says propane on it.

Hayward H Series... | Answered on Jul 21, 2009

The thermocouple is not producing enough voltage to keep the valve open. Try holding down for a longer period of time to allow the thermocouple to heat up, or you could have a loose connection on the gas valve. Loosen then Tighten all connections on the gas valve and try it again, if that doesnt work replace your thermocouple.

Hayward H Series... | Answered on Jul 10, 2009

This could be due to low gas pressure, inadequate air supply, or improper venting. Make sure gas is turned on; with propane, make sure the tank has fuel. Also check for water run-off from roof or sprinklers. Check to make sure the heater pilot tubing is intact and not clogged.

  1. Is the system switch on?
  2. Is the thermostat up to temperature?
  3. Is the pump running with a clean filter less than or equal to 16 psi on pressure gauge?
  4. Is the gas valve in the on position?
  5. Is the pilot lit?
  6. Is the gas supply valve open?
  7. Are all plumbing and filter valves open?
  8. If a bypass is installed, is it properly adjusted?

Hayward H Series... | Answered on Jun 26, 2009

hayward millivolt htrs are very difficult to light manually.i'm assuming your piezo ignitor is mal-functioning.use a grill lighter withn a goose neck and follow aluminu pilot tube to pilot hood

Hayward H Series... | Answered on Jun 21, 2009

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