Question about Hayward H Series Pool & Spa Heater Electronic Dual Ignition 250,000 Btu Natural Gas H250ed2

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Hayward heater blowing fuses1&2

Display blank & fuses 1&2 blown. Replaced transformer & blew fuse 1&2 again

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Shorted ignitor replace

Posted on Mar 19, 2016

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Posted on Jan 02, 2017

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SOURCE: looking for a 3amp fuse for a hayward pool heater

any automotive or electronics store

Posted on Jan 17, 2010

  • 990 Answers

SOURCE: when the unit powers up it blows the fuse at the

If the smoke got out of it it's bad. ;-)
Most transformers are 110v and 220v be sure how you are wiring it. I this is a Hayward heater you can find a book for it at
http://www.haywardnet.com/inground/products/manuals.cfm
Their are a couple of different heaters but they should all take the same transformer. I would go ahead and find the correct heater and print the book so you have it.
Once your sure of the wiring make sure you have the proper power going to the unit. To say if it is kicking the breaker you may just be getting half the power to come back on. Then unhook the transformer from the heater and see how much power you have. If your not getting a full 24v you may have burnt half the transformer. This means a new transformer. If it is still kicking the fuse you need to check all the wiring to the box and make sure that your problem is not there. If it's not kicking the fuse and you have good power, It will be in your heater and you will have to go through that to check for shorts. Your book will have a trouble shooting flow chart to help with this. Good luck.

Posted on Oct 17, 2010

  • 5245 Answers

SOURCE: hayward pool heater display reading AC

Hayward error codes shows AC is blower vacuum switch closed
http://waterheatertimer.org/pdf/Hayward-error-codes.pdf

Hayward pool manuals:
http://www.hayward-pool.com/prd/In-Ground-Pool-Manuals_10201_10551_14502_-1___I.htm

Posted on Oct 15, 2012

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I have Hayward H400IDL2 heater I recently had #1 and #2 1.5 amp fuses blow. I replaced them and then the #4 2.5 amp blew so I replaced it. When I press the mode button to spa the heater blower comes


Good Day, missed your post for a few days. #1 & #2 fuses are on the high voltage side. This could mean a problem with incoming voltage or a bad fuse or main circuit board. Call our tech line at 908 355-7996. I have attached a link to the manual. http://www.hayward-pool.com/pdf/manuals/H-seriesLowNOx-H250IDL2-H350IDL2-H400IDL2.pdf

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I have Hayward H400IDL2 heater 6 years old. I recently had #1 and #2 1.5 amp fuses blow. I replaced them and then the #4 2.5 amp blew so I replaced it. When I press the mode button to spa the heater


Hi, this is John the Hayward tech. If you are now seeing the #4 fuse go that is on the low voltage side. I would guess the main circuit board. I left a manual on your other post.

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