Need help selecting parts for Hayward H250FDN heater

[stillios]

Hi all,
I have attempted to read the Hayward heater help guide on his site and the troubleshooting document provided by Hayward, but I'd like a second opinion before I order more parts.

Based on the serial number, the heater was manufactured in January 2015. It came with the pool when we bought the house in 2021. It fired up okay this season about a week ago. It heated the pool, no problem. Then we got an "Sb" error code and couldn't get the keypad to do anything except flash the preset temperature. I read that Sb was a display failure code, which seemed consistent with what we were experiencing. After reading the troubleshooting documents, I ordered this from INYOpools: Hayward FDXLBKP1930 Bezel & Keypad Assembly, Universal H-Series Low Nox Heater - INYOPools.com

Hayward FDXLBKP1930 Bezel & Keypad Assembly
I connected it, and it didn't work. (On a side note, I tried to reconnect the old one and it wouldn't light up at all now, so that's a bit worrisome.)

Looking again at the troubleshooting flowchart (screenshot below), now I think I also need to buy a display, which is a separate thing on the page 20 referred to in the flowchart (screenshot below). I think I was assuming keypad and display were synonyms before.

So it looks like I should add IDXL2DB1930 to the bezel/keypad I just ordered to make this work. But what is the difference between ordering the separate display to go with my keypad and ordering FDXLBCP1250, as mentioned in the note above the parts list? Is FDXLBCP1250 everything I need in one -- display board, bezel, keypad? Does display board = control panel? Because the actual keypad I received when I ordered FDXLBKP1930 looks like this except it is shaped to fit on my heater and doesn't have that flap: Hayward Bezel and Keypad Assy with Door for Select Universal H-Series Low NOx Heaters - FDXLBKP1932 - INYOPools.com

Is the display board IDXL2DB1930 my next move here? It is concerning that I can't get the old display to light up at all now? I don't think I broke anything when unplugging it. Is it a problem that my new keypad looks different (different button placement) than the old one? Does that matter for display board compatibility?

Also, when shopping online for IDXL2DB1930, there is such a variety in pricing and even what that sku looks like (keypad included?). For instance, what is the difference between

Hayward Display Board Bezel IDXL2DB1930 - PoolSupply4Less

and

Hayward Universal H-Series Pool Heater Display PCB - IDXL2DB1930 Replaced by HDXFDSPB0001 - INYOPools.com

Thanks for any wisdom you can share?

 

[ajw22]

I will try and guide you although I have never put hands on a Hayward heater or needed to order parts. If @swamprat69 wanders by he may have advice.

It can be madding to figure out the correct parts for old equipment as manufacturers make rolling changes to the same model. And they provide technical bulletins and repair details only to their dealers and not make them easily accessible to the general public.

Pool Part pricing is all over the place because most of what is being sold is grey market through unapproved sales channels. Prices reflect whatever profit a company wants and what they think their brand is worth.

For instance, what is the difference between

Hayward Display Board Bezel IDXL2DB1930 - PoolSupply4Less

and

Hayward Universal H-Series Pool Heater Display PCB - IDXL2DB1930 Replaced by HDXFDSPB0001 - INYOPools.com

Probably no difference. Pictures on the product page are not always correct and complete. If you ordered both they will probably be the same.

Hayward has changed the display design on its heaters a few times. It is not clear when a different design can be substituted.

My advice is you need to talk with people who have had their hands working on your heater and have dealt with Hayward on their parts. This is where there is no substitute for experience, and sometimes you have to pay for the expertise. Call the pool stores and ask about what they list for sale and see if you find someone who knows about your parts. InyoPools has real people trying to help their customers. @InyoRich

 

[InyoRich]

Plus 1 (Maybe 1001) to AJW22's comments.

It gets expensive -quickly- to throw parts into an older heater. It looks like only the keypad and bezel were replaced (these are relatively low-tech items), so, if the display is suddenly out, I would check any/all connections to be sure nothing is loose or disconnected. Check the wires that go into the connectors to be sure none have been pushed out. Some of the lower voltage and signal lines need good, clean connections to communicate, so exercising them (unplug them and plug them back in) can help; sometimes cleaning the dead spiders off of the boards seems to help too. Check the transformer to be sure the power from it is getting to where it needs to go.

 

[stillios]

Thanks so much to both of you for your help with this. I will check all of those things and then head to the local pool store that sold and later repaired our robot under warranty. They were helpful and competent then and may have someone that works on Hayward heaters. If we decide to replace this heater, would it be terrible to replace it with the same thing to minimize other changes needed? Based on everything I've read lately, it is undersized for our 33,000 gallon pool. But we are now used to heating the pool a couple days in advance for a sunny weekend in April in Ohio, so maybe it doesn't matter. We don't use it in the summer. I'm just grateful I heated the pool to 80 degrees from 50 degrees before this happened. I know the water is about 70 degrees now, but my kids don't seem to mind.

 

[ajw22]

Check if your gas meter and pipe can handle a larger 400K gas heater.