Service on Aqua Hot

[FLYING BUTCH]

About how many hours do you all go between service on 04 Beaver Marquis aqua hot systems? Thanks in advance for information

[Mike Canter]

Usually once a year change of the fuel nozzle and the fuel filter. The fuel nozzles seem to be lasting longer without blocking up with the new ultra low sulfur fuel. The anti-freeze never has to be changed. Go you on this website and download the complete owners manual for your model. The model is on a plate attached to the unit.

Aqua-Hot Heating Systems Inc.

One thing I have found out is that it is better for the Aqua-Hot system if it is used on a regular basis. If you are only using the electric heat side of it then I would recommend running the diesel side every one to two months. I turn on all three heating zones on mine and let it run for about 45 minutes every two to three months.

[Jimmy F]

Along with changing the nozzle and fuel filter once a year I also pull the combustion chamber and check it to make sure it hasn't warped. Then I take a wire brush to it and the heat exchanger to remove any carbon/soot that might have built up, then vacuum it out with my shop vac.


Jimmy

[BigSkyBob]

Ditto what Jimmy said and I also clean the photo cell and adjust the ignition points with the gauge attached to the side of the combustion blower. I have let the nozzle go two years without issue since I started using ULSD fuel. I always carry a new nozzle and fuel filter with me just in case.

[FLYING BUTCH]

Thanks very much to all for the info. Like always great board with many who know RVing!!

[JFC]

I agree with Mike, be sure to use the system with diesel. We have Aqua-Hot on our 2007 coach. Never used the diesel burner, just the electric for hot water. We had the unit serviced each year, just never needed enough heat for diesel. Finally needed it this past January on a trip. No diesel heat, $300 in repairs. Probably could have been averted had we exercised the system more.

[Old Rv'er]

All - Aqua Hot recommends the diesel burner be used at least two hours a month even if not heating with it. THe more it's used the better it will operate. That much use will keep moisture out of the system, uses fuel which has been in the line and keep things going. I have also noticed that longer servicing is possible since using USLD fuel. I am certified in AH/HH repair and service.

[pjhalata]

so is it as simple as removing 2 screws to access these parts - from the outside? I have a 2000 Windsor

thx

[loranimal]

Where are you guys getting your parts at?

Carl

[Old Rv'er]

On the Monaco's I have seen the HH unit is tucked into a bay almost in the middle, so you have to crawl in to work on it in the compartment ahead of that one. Pictures would help. and there are 4 screws which remove the front cover depending on the model. Plus there are two different filters used, and you have to know which one is needed. You can PM me with the information (model number, filter type; and those pictures) and provide your e-mail and I will reply to that to answer those questions.
I would purchase my parts directly from Aqua-hot, as they have the best prices.

[Dr4Film]

For those Aqua-Hot and Hydro-Hot owners that need excellent service, trouble-shooting information, discounted parts, etc. there is a web site hosted by Roger Berke who is one of the BEST in the industry among a few others.

Here's the site.

HydronicRVHeating : Hydronic-RV-Heating

I would suggest signing up for the forum. A great resource for information.

Dr4Film ----- Richard.