IEMan 1

96 EVO - That pump's hose goes up right next to the other on for the registers. How would I know if it's the stir pump? And no leaking anywhere now. WooHoo! Jdw12345 - How do I check the AMP draw for the Aqua-Hot on the Alladin? I also figured that the diesel should at least fire up even if the heating element went bad by running with no boiler fluid. How do I test the main controller?

Here's my update. This is a project that is so crazy. I do greatly appreciate everyone's help on this though. I replaced the drain tube with brass and added a valve with barbed fitting so I can drain/fill the boiler. It took about 15 gallons total so I'm guessing it was pretty much empty. I had to replace the radiator cap also as it was leaking. When I put power back on, the Heating Status light is on, Diesel Burner Status Light is on, and Pump #2 light is on and the pump is running. I unplugged the pump itself so it isn't running constantly. I have no hot water at all after the electric heating button is turned on for a couple of hours. When I turn on the Diesel Heat button Not even the motor runs much less the burner firing up. I have correct voltage at the relays in the thermostat cover just fine. When I checked for voltage on the power line to the Electronic Controller it jumps all over with no rhyme or reason not getting an actual reading. The water is not hot at all other than being in 110 degrees in Texas. I have continuity on what I believe is the VDC High-Limit Thermostat and the Control Thermostat. No continuity at the VAC High-Limit Thermostat other than a slight beep every 2-3 seconds. I have not checked the Heating Element at all as the Electronic Heating Element Status light comes on when I turn it on. Does this make sense to any of you what I should check next? Thank you, Thank you, Thank you

Hello all, I wanted to give an update on my Aqua-Hot issue. I replaced the Control Thermostat, started to add boiler fluid into the tank and it started coming out the yellow tube on the bottom. It looks like that is the "drain tube". It was very lose and just comes straight out easily when pulled. It looks like it has a PEX sharkbite fitting that has gone bad. On Roger Berke's website it states that the drain fitting needs replaced and is a common problem. He had more info as a link to it on his website, but looks like the website is down. None of the links on the website work. https://rvhydronicheaterrepair.com/AHE-100-04S.htm Does anyone have any info on replacing the drain valve fitting? Thank you all so much.

Thank you, I will order a new control thermostat. Do you know if there are any good videos on best way to drain/replace the boiler fluid? Thank you all so much.

I do not see any leaks at filler neck/cap area or lines. Just wondering, when I filled the boiler fluid 3 weeks ago via the filler neck, about 3-4 ounces spilled out as there is a very tight spot to fill from. Is it possible that the spillage could have created the steam/smoke I am now seeing? It "looks" like the steam/smoke is coming from that yellow tube on the back bottom area. Is that an overflow tube? Could I have overfilled also? I'm grasping at different things here. I did not notice any smoke/steam before I started troubleshooting. The Burner did stay on longer after jumping the control thermostat wires which would indicate the control thermostat is bad, correct?

Ok, I jumped the leads and the burner fired up. After about 4-5 minutes it started steaming/smoking quite a bit. Not sure if the video will show on here. The steam I believe is coming from the yellow tube in the bottom back and smells very strongly of boiler fluid. I shut off the burner after about 6 minutes but I'm sure the steam shouldn't be there and the smell also. Any thoughts? AquaHot.mp4

If I jump these wires and it keeps running, will it shut off by the other thermostats or how long do I want to make sure that it does NOT run?

If I jump these wires and it keeps running, will it shut off by the other thermostats or how long do I want to make sure that it does NOT run?

Hi all, Ok, I am back able to look at my coach's AquaHot again. I started from scratch now. Tank is full of boiler fluid. When not all the way hot water, (It's 103 degrees outside) both thermostats have continuity and the control thermostat also has continuity. With diesel switch on, the burner fires up for about 4 minutes and shuts off. At that point both thermostats still have continuity but the control thermostat does not. Am I correct that the control thermostat is bad and just shutting off the burner before it should? And needs replaced? I truly appreciate all of your help on this issue. Thanks, Dave

I watched inside as it ran for about 3-4 minutes this time before shutting itself off. There was smoke coming from and around the yellow tube in the picture on the bottom. Smells a little like maybe some boiler fluid. Not able to see exactly.

I just checked it when cold. All 3 have continuity. Do I jump the spade connectors on the control thermostat side or the other 2 wires?

Just to give an update. I checked the continuity on the 2 high limit switches when cold. there is continuity. I checked the continuity on the spade connectors on the control thermostat and NO continuity. Does that test it or do I have to jump those 2 spade connectors together to see if it keeps running?

Hi, I do not see any temperature switches from the bay. Are they inside the unit itself? I can't find mention of them in the owner's manual or the shop manual either. How do I go about finding the switches? Or, even find out if they are on my model?

Another thing I can mention is there are no red lights on the front panel either. I really hope y'all can help me out. I greatly appreciate this site.

Hello, Boiler fluid is full, I check it weekly. As far as incoming water temp,, this has been this way now for the last 3 RV Parks shore water and it's the same at all of them. We have been in the RV for the last 3 months and this just started happening. It has been working great before.