Annual Service Maintenance on your Aqua-Hot

How to perform the necessary annual service maintenance on your Aqua-Hot Hydronic Heating System.
This specific video shows the annual maintenance on an Aqua-Hot 450D, however, the general guidelines and steps are usable for 250-D02, 250-D03, and all diesel 400, 450, 600 and 675 models.
If you have an older model Aqua-Hot, a propane Aqua-Hot, or any model not listed here please refer to your owner’s manual or Aquahot.com.
Annual Service Kit can be ordered directly through the Aqua-Hot website.

[@skinnerMTB]

Great video! Just finished my first service on a 250D. Greatly appreciate AquaHot being so open to DIYers! Here in California its not only incredibly expensive to service these things, but the wait times are OUTRAGEOUS. Had this knocked out myself in an hour!

[@johnnygottstein6091]

Did you find a video on services the 250D getting ready to tackle mine now?

[@retabera]

Just want to convey my appreciation for being DIY friendly

[@BillGiuliani-kh4jd]

Thanks for the guidance. One question I had while attempting to remove chamber was the hose in the upper right corner. Can that be removed without losing fluid?
Thanks,
Bill

[@ddixon1021]

There was reference in title to 250D and other models. The 250D has no resemblance to the 450D in this video. So if you're looking for a tutorial on 250D, this isn't it.

[@skinnerMTB]

I just finished service on my 250D. Process was exactly as stated in this video. Maybe you have an older 250D model??

[@markromero930]

You don’t even show where the filter is and how to remove it. What’s the deal?

[@scotth364]

Upper right of bay about 2 feet back, but not always the same, depends on manufacturer of rv. The one in this rv is white with blue writing