Question about Hayward H-series Electronic Gas Pool Heater H300

Open Question

Hayward H300 Pool Heater shuts off after about 2-3min

Hayward H300 shuts off after running about 3-5 minutes each morning. Will not run again until night usually. Sometimes (not often though) it will start up again for a few minutes if I click the igniter button, but it turns off again after a few minutes. Strangely enough it seems to run fine the last 3 evenings after dark, but will not work at all during the day, probably coincidence? Heater is about 7-yrs old, heat exchange inside is new. Gas pressure is fine (verified by gas company), filter is clean (new sand and backwashed).

Posted by on

5 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

john224
  • 1378 Answers

SOURCE: 1 year old hayward h1001d pool heater clicking

Actually, the clicking is likely causing the shaking. Inside the manifold of a H100 is a stainless steel diverter plate that send some of the passing water into the heat exchanger and lets the rest past and back to the pool. When it breaks, you will hear a 'clicking' noise at it rattles in the water path. When it breaks, the flow to the heat exchanger is intermittent and you will begin to boil the water, causing the shaking. This situation is dangerous, especially without a pressure relief in the heater or pipe. As long as your water chemistry is sound, Hayward will usually cover this under warranty even if the unit is over a year old. Contact them to get a factory authorized repair rep out at: http://www.haywardnet.com/locator/

Posted on Jun 12, 2009

  • 4 Answers

SOURCE: 1 year old hayward h1001d pool heater clicking

see this link ....

http://www.fixya.com/support/t1078177-hayward_pool_heater_h_series

Posted on May 25, 2009

  • 139 Answers

SOURCE: pool heater won't light

it is possible to light a pool heater with an ignition device,however it is not advisable.since your unit is calling for heat and the gas valve is opening,i suspect you have a faulty ignitor

Posted on Jul 24, 2009

jharwell668
  • 640 Answers

SOURCE: pool heater will not ignite

Try the owners manual for these pool heaters. It will have suggestions for getting your problem corrected.

http://www.backyardcitypools.com/images/Hayward/H100-Manual.pdf

Posted on Dec 07, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Low appears on the digitial display


may be a faulty pressure switch. the code LO represents not enough water flow for the unit to run. check for blocked lines. remove the supply\return lines to heater and make sure the shipping caps were removed (seen that happen)

page 38 of your owners manual

Jun 01, 2014 | Hayward H-series Electronic Gas Pool...

1 Answer

Hayward h200 pool heater (LO) Error code


check gas pressure sounds like gas meter is too small

Jul 12, 2013 | Hayward H-series Electronic Gas Pool...

1 Answer

Where is the temp sensor on a Hayward H300 ED2 pool heater


take off top there is a copper wired unit going into header and wire to the board

Sep 18, 2012 | Hayward H-series Electronic Gas Pool...

2 Answers

Hayward H 300 series pool heater for an inground pool. Pilot light is lit. Filter is clean. If I jump the terminals the heater will go on. If not the heater will not start.


I have an H300 Millivolt Hayward heater. It will start and run for about 1 minute then shuts off along with the pilot going out. I've tried cleaning all the terminals and running all new wiring but same result. I've also jumped out the TH to TH terminals leaving the jumper in place and it still shuts down after 1 minute. Any idea what that could be ?

Apr 24, 2011 | Hayward H-series Electronic Gas Pool...

1 Answer

Heater starts and runs for several minutes and then turns off


Since the unit runs for a couple minutes, I would first check for proper water flow. Find the pressure switch. It is usually round with two wire terminals and a copper/metal tube attached to it. With the wires attached, use a jumper wire to bypass the switch. If it runs longer check for flow problems.. (WARNING don't jump the switch for too long!!! Just enough time to see if the run cycle improves). Clean all the skimmers baskets, pump basket, backwash the filter (if a cartridge filter clean the filters). Try firing the heater again. If it still shuts down, replace the pressure switch. I never recommend adjusting it. Adjusting it too low can damage your heater and/or cause injury.

Jul 21, 2010 | Hayward 250K BTU NATURAL GAS POOL HEATER...

1 Answer

Hayward H300 heater runs but will not heat water


Your internal by-pass could be stuck open or the disc could be worn to the point of letting water pass too fast. Or your thermal control valve could be stuck open. These are both found in your water header going into the heater. Hope this helps, good luck.

Jul 02, 2009 | Hayward 100,000 Btu Heater For Ag Pool And...

1 Answer

Where is the pilote on hayward h300 pool heater


Follow the aluminum tube from the side of the gas valve down and it will lead you to the pilot assembly.

Jun 06, 2009 | Hayward H-series Electronic Gas Pool...

1 Answer

Hayward H300 Spa Heater will not fire up


try to replace the thermo sensor it is located on the left side of tghe unit and has 3 wires running to it.

Mar 05, 2009 | Hayward H Series Pool & Spa Heater 400k...

Not finding what you are looking for?
Hayward H-series Electronic Gas Pool Heater H300 Logo

Related Topics:

224 people viewed this question

Ask a Question

Usually answered in minutes!

Top Hayward Pool & Spa Experts

Jay Finke
Jay Finke

Level 3 Expert

1338 Answers

Bill Jordan

Level 2 Expert

372 Answers

john h

Level 3 Expert

10947 Answers

Are you a Hayward Pool and Spa Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...