SpaceNorman Posted October 15, 2017 Report Share Posted October 15, 2017 (edited) I've got an Aquahot 400D in my coach - but am experiencing some weirdness. Everything seems to behave normally - i.e, the heat exchangers in each zone start to blow when the coach temperature falls below the temp set on the thermostat - and will begin to blow warm air and the temperature readings at the exchangers quickly rise to roughly 90 degrees (tested with a digital infrared thermometer). However, after a very brief time (and before the temperature in the zone rises to the "set" temperature for the zone) - the exchangers start blowing cold air. Once they start blowing "cold air" - they continue to blow cold air until they are shut off manually (i.e., turning the thermostat controller to off). This happens consistently - and in conditions that I would NOT consider extreme conditions (i.e., outdoor temperatures in the 50 - 55 degree range, thermostat set to maintain 69 degrees inside the coach) I tried to post this question on the RV Hydronic Heater Repair Website. Unfortunately, my account appears to be stuck in "no man's land". They appear to have my email address on file - so I can't create a new registration. However, when I follow the instructions to recover the username/password of what must be an "existing" account - I get a message telling me that my username/password reset info has been sent to my email address - yet nothing arrives in my inbox (or in my junk mail files). Any input on my issue would be greatly appreciated. Heck, I'd even be happy with an email address to try to reach the folks at RV Hydronic Heater Repairs to get my account access issue resolved so that I can try posting there! Edited October 15, 2017 by SpaceNorman Quote The Spacenorman 2012 Holiday Rambler Endeavor 43' DFT 2012 Jeep Liberty Our Travel Website: www.penquinhead.com Link to comment Share on other sites More sharing options...
Wrknrvr Posted October 15, 2017 Report Share Posted October 15, 2017 (edited) You may have an issue with the sensor for the domestic hot water tripping the heat off. They do that so that when the hot water is used the heat shuts down to save the energy for the water. Just a quick thought. Vern Do the fans still blow air. If they do you may have a pump problem. Edited October 15, 2017 by Wrknrvr Forgot it Quote Link to comment Share on other sites More sharing options...
SpaceNorman Posted October 15, 2017 Author Report Share Posted October 15, 2017 (edited) 4 minutes ago, Wrknrvr said: You may have an issue with the sensor for the domestic hot water tripping the heat off. We had an issue with that shortly after we purchased the coach - and had the thermostat that controls that replaced. I suspect this problem is something different since we start getting "good" heat out of the heat exchangers in the coach ... 4 minutes ago, Wrknrvr said: Just a quick thought. Vern Do the fans still blow air. If they do you may have a pump problem. Yes - the fans on the heat exchangers continue to blow air. When the thermostat and zone sensors inside the coach see the temperature fall below the set temperature (usually 69 or 70 degrees) - the heat exchangers kick on, the fans start to blow - and actually blow hot air (temps in the 90s) - however after just a few minutes, the output cools to a degree or two (72..ish degrees) above the set temperature which "feels" like it's simply blowing cold air and doesn't do much to raise the temperature in the zone. Edited October 15, 2017 by SpaceNorman Quote The Spacenorman 2012 Holiday Rambler Endeavor 43' DFT 2012 Jeep Liberty Our Travel Website: www.penquinhead.com Link to comment Share on other sites More sharing options...
Wrknrvr Posted October 15, 2017 Report Share Posted October 15, 2017 Check and see if your outside shower is turned off at the handles. Also when it is not producing heat see if the pump has stoped working for the zone that is calling for heat. What year is your coach. See if you have 105 model pumps Quote Link to comment Share on other sites More sharing options...
Wes Taylor Posted November 27, 2021 Report Share Posted November 27, 2021 Brand new unit in 2022 entegra aspire coach. Was working fine and then control pad says no aqua hot source when i turn on floor heat. Any ideas?? Quote Link to comment Share on other sites More sharing options...
Kirk W Posted November 27, 2021 Report Share Posted November 27, 2021 Welcome to the Escapee forums, Wes! I would look for warranty service unless you are too far from any RV service? This sounds like a good question for Vern to address. Quote Good travelin !...............KirkFull-time 11+ years...... Now seasonal travelers.Kirk & Pam's Great RV Adventure Link to comment Share on other sites More sharing options...
oldjohnt Posted November 27, 2021 Report Share Posted November 27, 2021 Hey there Norman, as if this were any comfort lol I follow lots of RV travelers and they have had so many problems with the Aquahot system grrrrrrrrrrrrrrrr and this is even in NEW high end coaches. Looks like a trip to a certified reputable dealer Oh well such is RV life but I have no plans to quit...... John T Quote Link to comment Share on other sites More sharing options...
Wrknrvr Posted November 27, 2021 Report Share Posted November 27, 2021 So I am thinking your control pad may be having trouble communicating with the Aquahot. Last summer I had two situations where that was thought to be the problem. One customer was going to take to the factory in a few days . So we ended our searching for the problem at that point. He had another issue with the control pad on the wall not operating something else also. I was a dealer for years. But have decided to hide from work stuuffff for the winter. I would suggest to call the manufacturer Monday ASAP. I do think I would call Aquahot ASAP also. Have coach vin and last 8 of vin. Also the model and serial number of the Aquahot. As they both will ask for them to continue. Sorry not being able to help. It would be nice if you could post a picture of your control pad. And the name/make of it also. Vern it would really helpful to others if you could keep us informed as to what is happening with your unit. Quote Link to comment Share on other sites More sharing options...
Wrknrvr Posted November 27, 2021 Report Share Posted November 27, 2021 Do you have hot water. Is the electric to the Aquahot on. vern Quote Link to comment Share on other sites More sharing options...
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