rdickinson Posted February 19, 2017 Report Share Posted February 19, 2017 There are 2 ac/heatpumps on the roof, a 15k at the rear and 13.5 at the front of the trailer. The rear seems to be working outside ground temp in the shade is about 80f temp of inside of duct 49-45f taken with laser gun condensation on ceiling duct flange roof unit air exhaust 110f condensation running off roof. A little over a gallon in 18hrs. Fwd 13.5 air temp 75 out of ceiling duct temp of ceiling adjacent to grill 78 roof unit exhaust air temp 95 no condensation on inside ceiling duct flange. no condensation running off roof. They both used to start up in 3 stages, a few minutes when temps were set, then some part of them would start then a minute or more later the second part or stage would start up. Rear 15k still goes thru time delay then a 2 stage start up. Front 13.5 still has time delay then starts up but doesn't seem to cool. The front one seems to blow the breaker the odd time for some time. Any diagnosis or recommendations? Link to comment Share on other sites More sharing options...
I'mdonewiththis forum Posted February 19, 2017 Report Share Posted February 19, 2017 I sounds a good bit like the compressor on the front unit is not running. The next step would be to start checking wiring and make sure you are getting proper voltage to the compressor and condenser fan (if it is separate). Link to comment Share on other sites More sharing options...
Biker56 Posted February 20, 2017 Report Share Posted February 20, 2017 The start capacitor for the 13.5K is probably shot. Full Time since Oct. 199999 Discovery 34Q DP | ISBDatastorm | VMSpc | Co-Pilot Live | Pressure Pro2014 MKS Twin Turbo V6 365 HP Toad Link to comment Share on other sites More sharing options...
Jack Mayer Posted February 20, 2017 Report Share Posted February 20, 2017 The start capacitor for the 13.5K is probably shot. That would be my guess as well. Since I know you like to do renovations, now might be the time to give some consideration to a mini-split in one location. You will have to figure out where to put the outside unit. You can put it in "free air" on a carrier on the back. Or, if you have room underneath you can go there, as long as it has some space around it. Jack & Danielle Mayer #60376 Lifetime Member Living on the road since 2000PLEASE no PM's. Email me. jackdanmayer AT gmail 2016 DRV Houston 44' 5er (we still have it) 2022 New Horizons 43' 5er 2016 Itasca 27N 28' motorhome 2019 Volvo 860, D13 455/1850, 236" wb, I-Shift, battery-based APU No truck at the moment - we use one of our demo units 2016 smart Passion, piggyback on the truck -------------------------------------------------------------------------See our website for info on New Horizons 5th wheels, HDTs as tow vehicles, communications on the road, and use of solar powerwww.jackdanmayer.com Principal in RVH Lifestyles. RVH-Lifestyles.com Link to comment Share on other sites More sharing options...
Brad & Jacolyn Posted February 20, 2017 Report Share Posted February 20, 2017 When mine did this it was the start capacitor. It was easy to change (I did it myself) and the water started running off the roof again. Just make sure all your connections are tight when you change it. Brad Brad and Jacolyn Tucker the Wonder dog and Brynn the Norfolk Terrier 2009 Smart "Joy" 2004 VNL630 "Vonda the Volvo" 2008 Hitch Hiker 35 CK Champagne Edition VED12 465 HP, Freedomline, 3.73 ratio, WB 218" Fulltiming and loving it. Link to comment Share on other sites More sharing options...
I'mdonewiththis forum Posted February 20, 2017 Report Share Posted February 20, 2017 If the start capacitor failed you need to look into the cause of it failing. The capacitor is only designed to be used for starting and until the compressor is up to 2/3 to 3/4 of normal operating RPM. Any longer and the capacitor begins to heat up and will fail. There should be a relay that energizes the start windings that could have pitted and sticking contacts causing the start capacitor to be online for too long of a time. Changing the capacitor will get it functioning, but won't fix the problem. Link to comment Share on other sites More sharing options...
rdickinson Posted February 21, 2017 Author Report Share Posted February 21, 2017 Compressor, pulling 29 amps to start. new one ordered tomorrow and installed by end of week. Just under 2k$. 2 prices were within a few bucks. Link to comment Share on other sites More sharing options...
Biker56 Posted February 21, 2017 Report Share Posted February 21, 2017 2K$ should buy 2 new AC's installed. Whit some $$ left over. Full Time since Oct. 199999 Discovery 34Q DP | ISBDatastorm | VMSpc | Co-Pilot Live | Pressure Pro2014 MKS Twin Turbo V6 365 HP Toad Link to comment Share on other sites More sharing options...
rdickinson Posted February 21, 2017 Author Report Share Posted February 21, 2017 13.5 K btu ac/heat pump. The old one was analog, the new one is digital so there needed to be a converter somewhere in the.system due to a 15k unit for the main living area . Ad shop supplies, shipping from Ohio, tax, labor....just over 1900$ Link to comment Share on other sites More sharing options...
Jack Mayer Posted February 21, 2017 Report Share Posted February 21, 2017 Yeah, if you need a new control box that is going to add about $300 to the cost. And if you want or need a new single thermostat that will add also. So it does add up. It is still cheaper than going to mini-splits, but I will never have another rooftop RV AC unit. I just hate them They are noisy and inefficient. Jack & Danielle Mayer #60376 Lifetime Member Living on the road since 2000PLEASE no PM's. Email me. jackdanmayer AT gmail 2016 DRV Houston 44' 5er (we still have it) 2022 New Horizons 43' 5er 2016 Itasca 27N 28' motorhome 2019 Volvo 860, D13 455/1850, 236" wb, I-Shift, battery-based APU No truck at the moment - we use one of our demo units 2016 smart Passion, piggyback on the truck -------------------------------------------------------------------------See our website for info on New Horizons 5th wheels, HDTs as tow vehicles, communications on the road, and use of solar powerwww.jackdanmayer.com Principal in RVH Lifestyles. RVH-Lifestyles.com Link to comment Share on other sites More sharing options...
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