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Old 07-17-2013, 01:19 AM   #1
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RVComfort.zc

Having a nightmare with a/c here. Not good in Houston at 100 F plus!

After around 15 minutes or so our thermostat RVComfort.zc shows an actual temperature of 00. Sure enough after enough lag time - 2 mins - the a/c switches off as 00 F is below the 72 F set point,

I read on line that this used to be an issue a couple of years ago but haven't seem anything similar more recently. Anyone else experienced this and how did you fix it? The fix used to be to switch the 12v power to the thermostat off for anything up to 15 minutes. This does work but the issue happens again after 10 more minutes or so.

The one thing I need is a reliable air conditioning system!

Thanks
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Old 07-20-2013, 08:36 AM   #2
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RVComfort.zc

RickK54,
I also had this problem, fought it for 2+ years. I finally found "my" solution, here on this site. It is called a choke filter.
Heat/AC Thermostat Thermometer Reads 00
This is were I got the info I used from 2009 I think. I searched on e-bay and found the item for $25...out of stock. I went to 3 different dealers finally had one order the part from Coleman ( the Fleetwood part was 3 times the price at a Fleetwood dealer). It was $53 + S&H. On the package it came in from Coleman it has:
8330-3301, CHOKE ADAPTOR, RV PRODUCTS, Wichita, KS USA
From what I further investigated, the actual issue is "dirty" voltage due to florescence light starters, phone or i-pad chargers, battery chargers...anything that may fluctuate voltage on the coach. pull the Thmst, has a plug, filter is a male-female plug with a rheostat. Good luck!
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Old 07-31-2013, 02:50 AM   #3
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Thanks so much for your informative reply. I have now bought s choke which should be here by August 5th.

I thought after switching out the thermostat that we'd got it sorted. We're currently moving out of a house to go full time and have had the coach at an RV park in Houston for over a week without us living there. The a/c stayed on all that time. Sure enough the second night we were sleeping in it the mayhem returned. As you mention it must be stray voltage effects. Hopefully the choke will stop this nonsense.

Thanks
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Old 07-17-2014, 09:37 AM   #4
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We just experienced this "00" phenomenon on our RVComfort.zc and, thanks to this thread, were able to quickly diagnose the issue as a newly installed 12v ceiling fan that has a remote control. It is apparently introducing dirty voltage and as soon as we turn off power to the fan, the 00 issue disappears. We are very grateful that iRV2 was once again able to help us solve a mystery that could have been needlessly expensive!
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Old 07-17-2014, 10:59 PM   #5
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Great you were able to track it down to the fan! I would also recommend the choke. It took me 15 mins to install and the problem was solved
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Old 07-18-2014, 06:43 PM   #6
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We knew about the choke option, but we were concerned about the other 12v items (GPS, TPMS, dashcam...) in the coach that the choke wouldn't help.
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Old 07-18-2014, 06:48 PM   #7
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Here's a thread where I posted a photo of the choke filter for those who haven't seen one.

Fluorescent light interference
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Old 03-23-2019, 12:48 AM   #8
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This forum is the greatest thing we have discovered in our 40+ years of RVing. We were all You guys are lifesavers! Thank you.
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