Detailed parts list for Hayward H400FDN

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G

GatorW

Member
Feb 12, 2022
6
Houston
Is anyone aware where I can get a detailed parts list for a Hayward H400FDN pool heater. I need the parts list to identify the screws used to attached the various panels/top cover.

I have seen various parts lists online but not in the detail to indicate screw sizes.

Backstory is that I disassembled the heater to replace the heat exchanger. I was successful in removing the old heater exchanger and installing the new one.......however now that I am ready to install the various panels and top/side cover, I no longer have the screws.

I am hoping there is a detailed parts list and I can locate the screws at a local hardware store.

I have reached out to Hayward and requested the detailed parts list.

Any suggestions or direction on the topic would be welcome. Thank you!!
 
Welcome to TFP.

I have never seen a parts list published that has screw sizes. Maybe @swamprat69 knows.

You tried Hayward. I would try local places that work on Hayward heaters. Or maybe a local member with a Hayward heater will let you examine their heater to get the screw sizes. You also could buy one screw in a bunch of different sizes and try them.
 
Can you show a picture of the receiving nut used?

If they are like Pentair heaters, then they just use simple clip-on style nuts. The screws used to fasten to those nuts are standard machine screws or sheet metal screws. You can find them in almost any ACE Hardware store. If it is a clip on style nut, then you can take the nut with you to get the exact screw thread you need.

See here for what I'm referring to - McMaster-Carr

(PS - An old coffee can with a plastic lid or a mason jar with a screw on top makes a great place to drop screws and nuts into while you're working on something and it's hard to lose a big jar ... just saying ...)
 
I think that the screws are #12 x 1/2" sheet metal screws with a combo 5/16 hex/phillips head. You should be able to pull one and take to your hardware supplier to match up for sure. Doesn't really matter on the head type as long as you have the correct tool. Just match the size# and length to make sure the tip doesn't poke through anything.
 
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Swamprat - thanks for the input. You are correct, many of them are #12 with a few #10 and #10. I bought a few boxes at the hardware store and got it completed.

I'll remember the coffee jar for next time.......
 
I have found it very useful to have some small ziplock bags handy when removing screws / nuts & bolts. Put related fasteners in a bag and use a Sharpie marker to write a note on the ziplock bag as to where they go, then move on to the next section and use a different bag & note. You can still put the various bags in the coffee jar. ;)
 
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I also use my phone to snap a “before” picture of whatever it is I’m working on, especially electronics. If something needs a lot of disassembly then a few shots of it in the the assembled configuration can help solve the puzzle of parts when trying to put it all back together again. I’ll sometimes keep the pictures for reference or just delete them when I’m done.
 
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^^^^^^ *every* step gets a clear Pic. It seems so simple removing anything but this one screw was way over there and might not make sense an hour or 5 later. Especially when you had to take a break to take a kid to an activity and stop and get meat for burgers on the way home.

Then just look at the 537 pics in reverse.
 
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Newdude said:
^^^^^^ *every* step gets a clear Pic. It seems so simple removing anything but this one screw was way over there and might not make sense an hour or 5 later. Especially when you had to take a break to take a kid to an activity and stop and get meat for burgers on the way home.

Then just look at the 537 pics in reverse.
Click to expand...

Most 45min repair jobs take about 3 days to complete around here … with at least two trips to the hardware store AND the occasional purchase of that new power tool which will make the job so much faster to do next time when I have to do it in 3 years ….
 
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I'm lucky ... there's a Home Depot, a Lowes, and about 3 different ACE Hardware stores all within about 6 miles of where I live. There's also two different plumbing supply stores and one electrical supply shop that all the contractors use. It doesn't reduce the time it takes to finish a project, just gives me lots of price shopping options :ROFLMAO:

But first I have to spend at least 5 hours online watching YouTube repair videos and cross-referencing parts diagrams to figure out that the part I need no longer exists but can be substituted with one that is on back order for the next 3 months since it comes from China and the Port of Los Angeles is on their 3rd coffee break for the day ...
 
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