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Removing air-conditioning unit
I’m in the process of removing the old air conditioning unit on my 2006 mid bath. I will be installing a rec pro 15 K with a heat pump. It’s remote controlled.
In the process of removing the old unit there are two blue wires coming up into the unit that I’m thinking has to do with the thermostat. Because I will be leaving the thermostat associated with the propane heater, I don’t want to do anything to mess that operation up.
Does anyone know if it’s OK to simply cut the wires (blue) that are going into the old unit and cap them off or splice them together or what?
It is my understanding that the new unit will only need 120 V AC for operation.
I’m nervous about simply cutting off all of the other wires that were feeding the old air conditioning unit. Any words of advice?
2006 MB
Re: Removing air-conditioning unit
Reply #1 –
If your thermostat is a digital one that works both furnace and A/C, it will not function for the furnace with the A/C removed. If that is the case, replace it with a new thermostat wired only to the furnace. The blue wires may go to the furnace - check the wiring at the furnace to verify.

Steve
2004 FL
2013 Honda Fit
Re: Removing air-conditioning unit
Reply #2 –
The wall thermostat does control both the air conditioner as well as the propane furnace.
There’s something that looks like a telephone cable that goes from the thermostat on the wall up to the air conditioner. The blue wires that I am referring to apparently go back down to the propane furnace.
Holy smokes. I’ve got myself in a pickle because I don’t know how to connect this thermostat to the propane furnace.
2006 MB
Re: Removing air-conditioning unit
Reply #3 –
It is easy to find a new thermostat to control the furnace. Your current one works with circuits on board the A/C only, so will be useless unless your new one uses a compatible controller. When getting rid of the A/C, include the thermostat. You will just have run a pair of wires from the replacement thermostat over to the furnace.

Steve
2004 FL
2013 Honda Fit
Re: Removing air-conditioning unit
Reply #4 –
Steve, I thank you so much for your replies. I’ve now watched some YouTube videos and it should be relatively simple to get a furnace on the thermostat to mount. I guess my difficulty will be in sneaking the wires from there over to the furnace. Not a long distance so it should be doable.
I have looked in the furnace area and there’s lots of wires. I probably need a diagram to understand where I will be connecting the two wires that come from the thermostat. Haven’t found a diagram for the suburban propane heater yet, but I’m looking.
Not a lot of room inside that furnace area.
2006 MB
Re: Removing air-conditioning unit
Reply #5 –
Wow. My wording is terrible. I meant to say I should be able to get a thermostat that I can mount on the wall dedicated to the furnace.
2006 MB
Re: Removing air-conditioning unit
Reply #6 –
Quote
It is easy to find a new thermostat to control the furnace.

I ran into that same issue before. Here's the thermostats I used. The Luxpro was better than the Dometic. I looked for my notes on wiring but didn't find them, darnit!
jor

09 27' MB
10  Suby Forester
Re: Removing air-conditioning unit
Reply #7 –
Wow. My wording is terrible. I meant to say I should be able to get a thermostat that I can mount on the wall dedicated to the furnace.
2006 MB
Re: Removing air-conditioning unit
Reply #8 –
The Luxpro looks perfect.
I now understand that the blue wires are simply being connected together through the thermostat to provide 12 V from one side to the other.
I’ve just got to figure out how to get my head and hands in there to make the right connections when I install this.
2006 MB
Re: Removing air-conditioning unit
Reply #9 –
Thanks for the help you guys.
I’ve got this thing figured out and will order the new thermostat and install soon.
Now I’m back to removing the old air conditioner from the roof. The only thing keeping it on the roof now is the apparent glue that Lazy Daze used to seal the gasket to the roof.
Wow, is it stuck hard.
Wish I was stronger. Also, worried, I might bleed out when I cut myself on something reaching up in there.
Oh well.
2006 MB
Re: Removing air-conditioning unit
Reply #10 –
Quote
Wow, is it stuck hard.

You can say that again! I replaced the gasket on mine last year and could not believe how those boys stuck that baby on there. I mean, no one in the industry to my knowledge does that. It is absolutely not necessary. Anyhow, I went at mine from the inside with wood fulcrums and pry tools as well as knives. I was new to these things then and worried greatly about deforming the roof but it eventually came up with no damage. When you install your new a/c (as I'm going to do in a couple of weeks) my advice is to do it in the normal way without any adhesive.
jor
09 27' MB
10  Suby Forester
Re: Removing air-conditioning unit
Reply #11 –
Well, considering the lake Newton effect, I probably will add the sealant so as to ensure water doesn’t get in.  I’m hoping not to do this again anytime soon.
Good pictures and thanks
2006 MB
Re: Removing air-conditioning unit
Reply #12 –
Now I’m wondering what kind of a sealant Lazy Daze used?
2006 MB
Re: Removing air-conditioning unit
Reply #15 –
It isn’t Dicor, most liklet it is the polyurethane they were using in 2006.

Larry
Larry
2003 23.5' Front Lounge, since new.  Previously 1983 22' Front Lounge.
Tow vehicles  2020 Jeep Wrangler Rubicon, 2001 Jeep Cherokee
Photo Collection: Lazy Daze
Re: Removing air-conditioning unit
Reply #16 –
Pl s40  https://www.lowes.com/pd/LOCTITE-PL-S40-Window-Door-and-Siding-10-oz-White-Paintable-Polyurethane-Caulk/999924716, and just glue the bottom of the gasket, lightly to the roof. and set the A/C on top.  As long as 'Lake Newton' doesn't get deeper than the gasket, it should be OK.  If the water does get deeper, it should still be ok.   RonB
RonB (Bostick) living in San Diego
Original owner of "Bluebelle" a '99 TKB
Re: Removing air-conditioning unit
Reply #17 –
Thanks for the feedback Ron. That’s what I’m thinking about doing.
A crazy thing, I just got it all off the roof and, lo and behold, They used butyl tape underneath the thick gasket that goes with the air conditioner.
2006 MB
Re: Removing air-conditioning unit
Reply #18 –
Must’ve been the glue guys day off
2006 MB