Latest Discussions : Electrical & Lighting

wxc1999us

10:39AM | 06/03/04
Member Since: 06/02/04
4 lifetime posts
if so, how? can you help?

DanO

10:48AM | 06/03/04
Member Since: 11/11/02
2267 lifetime posts
** is it possible to add a thermostat control to a window a/c unit? **

It should have one already, why would you want to add another??

Dan O.

http://www.Appliance411.com/?ref411=air+conditioner

The Appliance Information Site

=Ð~~~~~~


wxc1999us

10:51AM | 06/03/04
Member Since: 06/02/04
4 lifetime posts
the window a/c i have does not have thermostat


DanO

04:00PM | 06/03/04
Member Since: 11/11/02
2267 lifetime posts
I've never seen a window or wall air conditioner without a thermostat but if that's really the case one should be able to be added provided:

1. There is room on the unit for one to be installed.

2. You can figure out how to modify its wiring to accept one.

You can see two 'universal' window air conditioner thermostats at the following link. I don't know what you'll use for a knob or the temperature dial calibration marks. I do not believe they come with them.

Air Conditioner Thermostats

LINK > http://www.appliance411.com/data.php?a1=thermostats.html

Dan O.

http://www.Appliance411.com/?ref411=air+conditioner

The Appliance Information Site

=Ð~~~~~~


wxc1999us

04:49PM | 06/03/04
Member Since: 06/02/04
4 lifetime posts
i meant if it is possible to either replace the dial thermostat with or connect to a electronic thermostat so the a/c can be turned on and off automatically, similar to the "economy mode" of some latest models. thanks

DanO

01:25PM | 06/04/04
Member Since: 11/11/02
2267 lifetime posts
Well that's certainly different than not having a thermostat to begin with. Unfortunately, I have never seen such a retrofit kit available and doubt there is such a thing.

Whether you can design something which would work is anyone's guess, you would *not* be able to use a low voltage central A/C thermostat without a bunch of relays, etc. to use to cycle the units components.

IMO if you want an air conditioner with a digital temperature control you'll likely have to buy one with that feature already on it.

Dan O.

tomh

03:27PM | 06/04/04
Member Since: 07/01/03
549 lifetime posts
We built a wine cellar and used a thermostat to control the electric power to a small AC unit that is used to maintain a contant temperature. This application is used in greenhouses, whole house fans and lots of other applications, and it costs less than $50.

Take a look at the inexpensive options at this link: http://www.littlegreenhouse.com/accessory/controls.shtml

These thermostats work by turning on and shutting off the power in response to a set temperature range. It does not use a low voltage system to kick on a relay like conventional HVAC thermostats.

DanO

10:42AM | 06/05/04
Member Since: 11/11/02
2267 lifetime posts
** Take a look at the inexpensive options at this link: http://www.littlegreenhouse.com/accessory/controls.shtml **

Nice. The "Thermostatic Outlets" look interesting and at 15 amps should be able to handle most window a/c's although switching on the *whole* a/c (motor and compressor together) at the same time will draw more amperage initially than is normally done but in most cases shouldn't be a problem.

The Thermostatic Outlets might be more useful though with a dehumidifier to prevent freeze up as they don't usually have thermostats.

Maybe one of the others will work for what the OP has in mind? They seem reasonably priced.

Dan O.

BV008125

05:37AM | 06/19/15
you fools, here it is
http://www.amazon.com/Lux-Heating-Cooling-Programmable-Thermostat/dp/B000E7NYY8

BV006507

07:26AM | 06/19/15
Now that's what I call "nice" LOL.

BV011818

06:01PM | 06/04/16
Yes. There are a few ways to do it but you will need some electrical skills. Window units have a turn dial setting for warmer/colder that is a simple thermostat. Inside the AC for the turn dial is a relay connected to a thermistor that measures the air temp coming into the unit. I unhooked and removed this relay and replaced it with a 30amp simple relay. for my situation, the new relay was controlled by 24 volts AC. I also had to buy a transformer to provide the 24VAC. I then run the wires that control the relay to my wall thermostat mounted in the middle of the room. Now I turn the ac on the cool mode on the fan setting that I want. Then I turn the digital wall thermostat from off to cool mode and it actuates the relay, turning on the compressor. The compressor will run until the room temp reaches the setting on the wall thermostat. This creates a more accurate room temperature. I also have a squirrel cage fan in the room to spread the cold air from the ac across the room.

BV010734

08:59PM | 06/04/16
All that?? Why not just buy the 36 dollar unit? LOL. Your way the fan keeps running instead of turning the whole unit on and off to save energy. Asinine.

BV014332

01:05AM | 07/23/17
I know this is an old post but for those interested in doing this it is very possible and pretty easy. Here is a link to the thermostat controller I use.
https://www.amazon.com/gp/product/B00OXPE8U6/ref=oh_aui_detailpage_o07_s00?ie=UTF8&psc=1
You can also do fancier stuff with a Arduino or raspberry pi board, some temp sensors and some relays switches. Good luck all.

-The Mad Tech
http://themadtech.com

BV016252

08:02PM | 04/27/18
https://flair.co/products/puck

I've been using this and highly recommend.

BV018490

10:07PM | 01/23/19
what about 220v system ?

BV020060

03:02PM | 08/13/19
For 220 vac applications:
White-Rodgers 90-T40M1 hooked to neutral and hot1 to provide 24 VAC control circuit, then white Rodgers 90-380 dual pole, dual throw relay. Run both hots through the 90-380 and use the thermostat to close the circuit on the 24 VAC side.
If it's a smart thermostat, then connect R to the output side of the transformer, Y to the relay.
C connects to the other side of the relay to ground the thermostat.

There are prepackaged variants available as well, they're all over amazon


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