NO HOT WATER

[Bill Parrish]

I have an aqua hot 450DE heating system.  The furnace part system works fine, both diesel and electric, but neither work heating water.  Any suggestions what's wrong?

Bill :-/

[Richard And Babs Ames]

Aqua Hot has a trouble shooting guide. On our Aqua Hot it was the Water Mixing Valve as the heat excchanger heats the water to 180 degrees and the water mixing valve allows the addition of cold water to bring it down to arround 130 or about a normal water heater setting.

Did this happen all of a sudden?

[Bill Parrish]

Yes, all lights on the control panel are green.  It appears to me that the deisel burner only  stay on long to heat the fluid in the glycol tank when the furnance is turned on.  I thought when I asked for hot water the burner would turn on, but it does not.

[Gerald Farris]

Bill,
If the coolant reservoir around the burner chamber is hot, the burner does not need to come on to heat water. The domestic hot water is heated by circulating through a heat exchanger inside that reservoir, and as the fresh water cools the fluid in that reservoir, the burner will fire up to maintain the proper temperature. So if the burner has run long enough to heat the reservoir of boiler fluid that surrounds the burner, you will have hot water unless your mixing valve is not operating properly.

Gerald

[Orman Claxton]

Hello Bill
Give  me a call or send me an email, i walk you through trouble shooting your H/H
Thanks
orman Claxton
206 660 9893
Authorized  Aqua-Hot tech

[Bill Parrish]

sorry guys... where is the mixing value and what does it look like.  I have a picture of the back of the unit with part names, but don't see mixing value.

Thanks

Bill

[Gerald Farris]

Bill,
The mixing valve is located about in the center of your picture with the gray looking knob on top.

Gerald

[Bill Parrish]

Ok, we were able to squeeze in the compartment and turn the value in both directions and tried to heat water, but nothing.  What does the value do?  Is it a value that must be turn one way or another?  Is it electronic?  One more try before I make an appointment with a maintenance shop.

Thanks again,

Bill

[Edward Buker]

Bill,

The valve works like a thermostat in a car. It has a spring that expands and contracts with temperature and that regulates the flow between the hot and cold side to the output. They can get mineral deposits that impede its regulation or it can mechanically freeze up from lack of use. If you have rotated it in one direction and the other and it still does not work then it may have to be changed. Before that is done you need to see if you can sort out the problem to that source first.

later Ed

[Richard And Babs Ames]

http://www.aquahot.com/Service-Help.aspx Has owners manuals with trouble shooting guides and technical support to help you and service center reccomendations. We have Orman Claxton (see above) also.

[Bill Parrish]

One more clue.  I unhook the city water and run off fresh water tank, using the water pump and I get medium hot water.  anybody got  ideas?

Bill

[Karl Welhart]

Bill, are your outside shower knobs turned to the off position, both hot and cold?

[Bill Parrish]

Thanks folks for all your comments and suggestions but I have given up and am taking it to certified Aqua Hot repair center ion Mayfield Ky.  It's about 4 hours away and hope they can fix in a short period of time.

Thanks again,

Bill & Debbie

[Bill Parrish]

Karl you are the winner.  Cold water was on at outside shower, but turned off at shower head, acted as mixing valve.  Once corrected, have all the hot water we could want.

Thanks again everyone,

Bill and Debbie

[Richard And Babs Ames]

Hope you found it before the trip.