I have 2 Aquahot seals leaking when it is running. Would that be the seals.
The O rings fail, find the post on replacing all 3 at the same time.
Just an O ring that should be easy and yes I would do all three. Thanks
You need to pinch off the engine loop along with the inlet and outlet hoses. Maybe Rudy will give more info. When I did mine I didn't pinch off hoses and had to drain the AH and the engine loop. Also a very special o ring the number is on the forum from when John did his.
Thanks I will pinch off the engine hoes and the Aquahot needs the fluid changed.
I don't know why the A-H fluid would ever need to be changed. Just check PH annually.
Servicing Aqua Hot. Pages 11-13 specifically cover antifreeze, not just heat transfer ability with proper ph, but also anti corrosive benefits, thus requiring occasional changing.
Jack that information is for the newer Aqua Hot models that use boiler fluid. It doesn't have the same corrosion resistance as EL coolant
I'm new to Aquahots so I am learning. What antifreeze should I be using. The person I bought it from said he was going to put the
same antifreeze that was in the engine and I have lots of that.
It can use the coolant that the engine uses. Best if you can put the factory type ELC in the engine, Aqua Hot and generator. Then only have to carry one type of coolant on the coach. There was a lot of discussion a while back on the life of the different coolants, and a member even posted the conversation he had with the manufacturer. From what I can remember the Aqua Hot using the ELC would never need to be changed.
That's the kind of antifreeze he gave me. Changing the O rings should be easy but getting the pumps out of there looks awful.
I haven't figgered out how to drain the system without making a mess.
I drained the AH through the hole in the bottom of the AH bay into clean buckets and used a hand pump to put it back in. It would have been much easier if I had pinched off the lines. When you pull the pumps have rags under the whole area to avoid having coolant odor for some time to come. The service manual covers the how to part, it has be linked on the forum before. It is time consuming for sure but not rocket science.
I found the drain and the pumps are out. It smells like antifreeze. Does the boiler fluid smell like antifreeze. The O rings are flat.
On your year coach it is antifreeze in the boiler. Do you have the special red o rings?
If you Aqua Hot heater has an electronic control board with led lights, you need GRAS Boiler Antifreeze such as Camco. If your heater has fuses and three clear relays, you can use the same engine antifreeze used in main engine and gen.
If you have a remanned heater, you need GRAS Boiler Antifreeze.
Mine has the clear relay What is a remanned heater.
Remanufactured
How would I know if it is manufacturer
It wouldn't matter, as long as you have the fuses and the clear relays, your model takes the same coolant as the engine.
If you have the March 809-BR pump you are going to need to order the red silicone rubber o'ring. You can see them at the link below. You can also find them on eBay. Make sure you have the Bronze pump. That is why you have BR in the pump model number. Also the service manual covers the procedure for shutting down the system to remove the pumps. Attached is the service manual.
John M.
March 0809-0165-1000 Silicone O-ring (https://bestbuypumps.com/809-165-10-Silicone-O-ring-809-BR-815-SS-MAR-0809-0165-1000.htm)
http://www.aquahot.com/files/service_manual/AHE-100-02S%20Service%20Manual%20Rev.%20B%209-27-2011.pdf
A remanufactured heater has the freshwater coil in the coolant tank. Hence the need for GRAS boiler fluid.
A reman heater will have a model number starting with "RM". AHE 100 will become RM 100.
Hope this helps.
My model # is 431/12. On the side is Aquahot By Vehicle Systems. I just found a tag on the over flow tank Shell ELC was serviced in
2016. What is GRAS Boiler fluid.
Generally regarded as safe (for human consumption)
John that's the pump I've got. Thank's everyone for the help. As it had antifreeze in it I am going to keep using it.
What has changed within the boiler to require GRAS?
Is it a Potable Water safety issue?
Thank You
Tim
The fresh water tubes wrap around the tank on earlier units and the tubes are inside the tank on the ones that require GRAS. If a tube developed a leak inside the tank on the later units contamination would occur.