Removing air-conditioning unit July 09, 2023, 11:25:38 am 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?
Re: Removing air-conditioning unit Reply #1 – July 09, 2023, 12:10:21 pm 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
Re: Removing air-conditioning unit Reply #2 – July 09, 2023, 12:42:07 pm 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.
Re: Removing air-conditioning unit Reply #3 – July 09, 2023, 01:24:59 pm 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
Re: Removing air-conditioning unit Reply #4 – July 09, 2023, 01:30:33 pm 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.
Re: Removing air-conditioning unit Reply #5 – July 09, 2023, 01:50:05 pm 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.
Re: Removing air-conditioning unit Reply #6 – July 09, 2023, 01:54:49 pm QuoteIt 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
Re: Removing air-conditioning unit Reply #7 – July 09, 2023, 02:03:23 pm 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.
Re: Removing air-conditioning unit Reply #8 – July 09, 2023, 02:09:24 pm 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.
Re: Removing air-conditioning unit Reply #9 – July 09, 2023, 02:38:14 pm 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.
Re: Removing air-conditioning unit Reply #10 – July 09, 2023, 02:46:18 pm QuoteWow, 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
Re: Removing air-conditioning unit Reply #11 – July 09, 2023, 05:19:08 pm 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
Re: Removing air-conditioning unit Reply #12 – July 09, 2023, 05:58:25 pm Now I’m wondering what kind of a sealant Lazy Daze used?
Re: Removing air-conditioning unit Reply #13 – July 09, 2023, 06:34:14 pm Quote from: Jackhiett - July 09, 2023, 05:58:25 pmNow I’m wondering what kind of a sealant Lazy Daze used?Probably their standard polyurethane adhesive .Larry
Re: Removing air-conditioning unit Reply #14 – July 09, 2023, 06:46:15 pm Quote from: Larry W - July 09, 2023, 06:34:14 pmProbably their standard polyurethane adhesive .LarryDo you by chance know what that would be? I assume not a Dicor type but maybe something like 5200?
Re: Removing air-conditioning unit Reply #15 – July 09, 2023, 06:48:32 pm It isn’t Dicor, most liklet it is the polyurethane they were using in 2006.Larry
Re: Removing air-conditioning unit Reply #16 – July 10, 2023, 03:47:57 am 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
Re: Removing air-conditioning unit Reply #17 – July 10, 2023, 12:44:33 pm 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.
Re: Removing air-conditioning unit Reply #18 – July 10, 2023, 12:45:33 pm Must’ve been the glue guys day off