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Topic ClosedAC Thermostat Bypass - Short Cycle
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fwunder View Drop Down
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Posts: 1676 		Direct Link To This Post Topic: AC Thermostat Bypass - Short Cycle
    Posted: 27 Jul 2021 at 3:35pm
It's fixed !!

Power of positive prognostication !!

Today inside temp was 98 when I set tstat to 74 this afternoon. It's currently 73.9 inside.

Thanks to everyone who helped me find the problem and getter fixed !!

don't jinx it

fred
2014 RPod 178 => MyMods and Buying Habits
2008 4Runner Limited 4.0-liter V6
Yes, those are wild ponies dining on grass while dumping tanks!
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Posts: 5290 		Direct Link To This Post Posted: 25 Jul 2021 at 7:49pm
Do you have some reason to think there actually was a 12v wiring problem with the PD panel? Did any other 12V circuits have issues? If not then it seems unlikely that was the origin of your a/c problem. I suggest that if you're really lucky you might never know....Don't worry, be happy...
1994 Chinook Concourse
1995 RV6A Experimental Aircraft
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campman View Drop Down
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Posts: 209 		Direct Link To This Post Posted: 25 Jul 2021 at 4:48pm
I could very well be, as it is the only change to the electrical system...I would think the voltage for the thermostat is 12 volt controlled and that could be where the issue was. Now only time will tell as you use/test your air-conditioning.

Just to make you feel like you are not alone, I have been chasing an electrical snag with our new 192. Just got home from a 4 day 900 mile 'round trip to Southern Ontario to visit my wife's parents...got home and couldn't get electrical power to the trailer. It was pouring rain last night so cut short the trouble shooting. Metered the 30 Amp cable...it was fine, EPO said my wall plug is good. So pulled the TT power input plug for shore power and found that during assembly the wires weren't properly secured inside the trailer plug and were arcing. Some melted plastic cleaned up, disassembly and proper re-assembly of the entire plug before hooking it back up did the trick so far.

Fingers crossed all is good as we leave Tuesday for our 2nd trip, this one to Manitoba (2000 km, 1200 miles one way) to meet our first grandchild!

Have a good one and I will be watching to see if your electrical problem is gone...or not.

Andy


Andy and Laurie
'16 F150 5.0 4X4 w/factory tow pkg
'21 RP192
"If the women don't find you handsome...at least let them find you handy!"
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fwunder View Drop Down
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Posts: 1676 		Direct Link To This Post Posted: 25 Jul 2021 at 4:13pm
When we left you last...

The AC tech had left, the unit was working perfectly and I was drinking heavily.

So beginning Wednesday evening I left the AC on auto w/tstat @ 72. Thursday, I changed tstat to 74. It has been on auto continuously since Wednesday with, interestingly, the Progressive Dynamics converter also on. 20 amp home circuit. You will see from the attached image, the AC has been working perfecting, cutting in and out with a range one would expect with outside temps in mid to high 80's and pod in full sun.

But wait...there's more....

I didn't think the following was that important, but now I am really wondering.

Before AC tech arrived and because the unit was acting so freeking crazy and I was running out of ideas and strong enough liquor, I swapped the thermostat back to the old one. It was still short cycling so I decided to put the new one back on. This time, though, I swapped out the DC panel. "He did what, you ask?!!"

A while back and about the first time I remember the AC problem, I replaced the WFCO converter with a Progressive Dynamics. The PD came with its own DC panel. Functionally, the only difference is a "charge wizard" button that pumps a manual fast charge. Not really necessary, but I figured I'd use the panel since I had it. What a PIA it was trying to fit the panel in the WFCO enclosure! I made it work, stuffing it in and it seemed to be working fine although access to the DC fuses was almost impossible  without removing WFCO cover.  Fast forward...

When swapping tstats I wanted to pull DC 12v. fuse. On my unit it's #5 ( Bathroom lights ). Because of the hassle pulling and replacing fuse with PD panel and thinking future potential problems, I decided to put the old WFCO panel back in place. That was the only ( wiring ) change I have made to the system since this began.

Is it possible a 12 volt problem could have been the source of all my problems ( please don't get personal! )? Could I have fixed it by fixing a 12 volt problem? Should I resume drinking heavily?

As Walter Conkrite would say, "And that's the way it is."

fred
2014 RPod 178 => MyMods and Buying Habits
2008 4Runner Limited 4.0-liter V6
Yes, those are wild ponies dining on grass while dumping tanks!
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Posts: 5290 		Direct Link To This Post Posted: 22 Jul 2021 at 10:15am
Maybe it's fixed! Often just taking things apart, fiddling with them and putting them back corrects problems. Dont look a gift horse in the mouth as they used to say.
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1995 RV6A Experimental Aircraft
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fwunder View Drop Down
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Posts: 1676 		Direct Link To This Post Posted: 21 Jul 2021 at 6:14pm
Just to followup...

I can't make the problem happen again!! 

Somewhere along this journey someone pushed or jiggled the right wire or unplugged and plugged the right connection. It's not a solution, but whattaya gonna do?!

I'm having a tough time finding the 40/15 run capacitor or the overload relay - out of stock everywhere. I understand I might be able to use an alternate run capacitor if it came to it.

In the meantime, I'm going to keep trying to break it so I can fix it!!

fred
2014 RPod 178 => MyMods and Buying Habits
2008 4Runner Limited 4.0-liter V6
Yes, those are wild ponies dining on grass while dumping tanks!
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Posts: 5290 		Direct Link To This Post Posted: 20 Jul 2021 at 7:26pm
This will probably work too and doesn't cost as much as an a/c. Still not exactly cheap though.
DAQ
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1995 RV6A Experimental Aircraft
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fwunder View Drop Down
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Posts: 1676 		Direct Link To This Post Posted: 20 Jul 2021 at 4:45pm
Ooooh, this would work!


A new AC probably would too! Ermm
2014 RPod 178 => MyMods and Buying Habits
2008 4Runner Limited 4.0-liter V6
Yes, those are wild ponies dining on grass while dumping tanks!
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fwunder View Drop Down
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Posts: 1676 		Direct Link To This Post Posted: 20 Jul 2021 at 4:39pm
Originally posted by campman

Hello fwunder, thanks for documenting all the work you have been doing on this a/c cycling issue. I know I can't be the only one watching this thread (and pulling for you that you can isolate and solve the issue)....

Thanks Andy. I hope this thread might offer some clues to anyone else who might have a similar problem. I have scoured many forums and come across more than one long thread of AC short cycle issues. I think I have the first one that is so crazy intermittent with same and stable power supply.

I don't have a EPO or surge protector on it here @ home. Since the problem has (intermittently) happened on campground pedestal, sister's house on 20 amp circuit, my house on 20 amp circuit and generator, I'm not sure EPO would tell me much.

It would be interesting if I could monitor and capture 24 hours or more of power data like I can with my new Govee Wifi thermometer.

You can see that after about 1:30 when tech was gone and I put everything back together, the AC has been working well with ambient about 90.
2014 RPod 178 => MyMods and Buying Habits
2008 4Runner Limited 4.0-liter V6
Yes, those are wild ponies dining on grass while dumping tanks!
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offgrid View Drop Down
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Posts: 5290 		Direct Link To This Post Posted: 20 Jul 2021 at 10:57am
I think the 10A is a little lowif anything. If that was the compressor only (not including the fan then you would be about 13A total for the a/c.   IIRC my a/c took about 15A.

I agree with your tech on replacing those couple items. They're cheap and easy. Too bad it didn't fail while he was there to see it.
1994 Chinook Concourse
1995 RV6A Experimental Aircraft
2015 Rpod 179 - sold
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