Hook up two thermostats one furnace

  • How Furnace Zoning Works (And Everything Else You Need to Know About Zoning)
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  • Two Thermostats, One Zone

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How Furnace Zoning Works (And Everything Else You Need to Know About Zoning)

Posted By RobinJoe , Mar 4, at 6: Our thermostat is in the hall, halfway between the livingroom with our wood-burning stove and our Master Bedroom. We have central forced hot air with a gas furnace, and central airconditioning. Is there a simple way to add a second thermostat to the bedroom in parallel with the thermostat in the hall? Or will they interefere with each other? We would like the heat to kick on if either thermostat drops below 69 degrees.[rs_table_products tableName=”Best Dating Websites”]

I could also install some sort of switch near the hall thermostat to switch between the two, but would like to avoid that if possible. Stop hovering to collapse Click to collapse Hover to expand Click to expand Here’s a solution. It requires a double-throw switch to allow one or the other thermostat to control: West Michigan. I see you haven’t received any responses. I’m confused – what are you trying to control with the second thermostat?

There is an easy way to add a second thermostat if you are looking to add another device that needs control. But I can’t quite tell what it is you’re trying to do here I suppose you could do just that If either stat closed, it would close the circuit and the heat would come on. Then once both stats were above the set point, the heat would go off. Northeastern MA near Lowell. SW Virginia. I agree with Gooserider. You could cause problems. You might need to isolate the 2 thermostats from each other.

What kind of thermostat do you have currently? I’m always confused, FWIW, but don’t all of the low-voltage hot wires generate from the same source, and all the neutrals return to the same point? What diff does it make if two Tstats’ hot wires meet at the relay? Nothing will happen, since they already “met” at the source, right? I don’t see a problem. I’m not sure off hand either – I’m not sure just what they use for output circuitry in those thermostats, but I DO know that the instructions on several that I’ve looked at SAY don’t attempt to fire off the furnace by shorting the thermostat leads at the burner Which is a fairly standard trick used by many burner techs, and which is fine on something controlled by one of those old round Honeywell mercury stats.

I do know that I’ve had electronic stats that have failed to work right after that was done. Putting two stats on the same contacts is going to be doing effectively the same as jumping the contacts for the one that doesn’t turn on first Some day, when I grow up, I am going to learn more Off to the sack. BTW, if I remember, those instructions about not hot jumping are generic, and somewhat archaic, too. This induced a magnetic resonance in the capillary thermisters, that, if it became harmonic, would cause them to explode, like the original crankshafts on the experimental 3-cylinder Mercedes engine many years ago that is why it never came into mass production.

It was not a pretty site, and too many boiler techs lost fingers. That is a good point, goose – It may be they are worried about some type of inductive kickback from throwing a screwdriver across the terminals at the motor and the resulting surge when you break the contact. Though, ‘technically’ that’s not what you’re doing with the two stats. But it’s always better to be safe than sorry! Jay H. Well, I read instructions of how to build a tool to do it and they suggested not to simply short the two pins, but to put a small resistor in series with the pins for a particular reason.

I’m no EE or physics major but maybe this is what the purpose was for Could something similar be designed for 2 t-stats on one zone? If these worked on DC current it would be relatively easy to isolate each thermostat using a diode. However, I believe they operate on volt AC. I’m thinking a dual-coil relay might be a solution but I”m going to ask some guys as work for other ideas. I’m thinking now that with a few diodes and a relay this may be relatively easy except for the fact that you may need to control the compressor, fan, and gas burner separately.

If you just needed to control one of those you could use 2 diodes and a relay as shown the attached drawing. BTW, since you’re working with AC there is no positive or negative 24 volts as I’ve shown but it helps to think of it that way when you’re wiring it up. The diodes isolate each thermostat from seeing the other one and also rectify the AC to DC. Relays don’t really care whether you’re using AC or DC to trip them the addition of a capacitor is needed for AC operation.

The contacts in the relay serve the same role as the contacts in the original thermostat. I’m just not sure how to address the three different things you need to control. This would require buying a 2nd thermostat. The thermistor is the semiconductor temperature sensing device that most electronic thermostats use. You could then place the 2nd thermistor in the bedroom so that the original thermostat would essentially sense the higher, lower, or combination of the temps in both rooms.

This may be the easiest solution. Again, I’ll talk to the guys sat work for a sanity check. This is just he kind of problems I love to work on. I’ll be lying awake tonight thinking about this one. If nothing else I’ve either given you some ideas or turned you off on the whole idea. Attached Files: Show Ignored Content. Share This Page. Your name or email address: Do you already have an account? No, create an account now.

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One idea I have is to wire two thermostats, not in a series, to the furnace. You need to contact a contractor and have them look at setting up. How to Wire Two Thermostats to One HVAC Unit. With a home of Mount the zone control box near the furnace, either on the ductwork or a close wall. Run an .

Posted By RobinJoe , Mar 4, at 6: Our thermostat is in the hall, halfway between the livingroom with our wood-burning stove and our Master Bedroom. We have central forced hot air with a gas furnace, and central airconditioning. Is there a simple way to add a second thermostat to the bedroom in parallel with the thermostat in the hall? Or will they interefere with each other?

Central heating and air conditioning HVAC systems are all controlled by some kind of wall-mounted thermostats that sense room temperature and turn the systems on and off whenever necessary. There are quite a number of different thermostat styles, ranging from the old standard mercury-contact thermostat in the familiar Honeywell dial style, to extremely modern digital thermostats that operate entirely by touch-screen controls.

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The Best Thermostat for Multiple Zones

Download the Sensi app on your smart phone or tablet for easy, step-by-step installation instructions. If you are not connecting your Sensi thermostat to Wi-Fi, follow the instructions below to wire and correctly configure your thermostat for your heating and cooling equipment. Turn off the power to your heating and air conditioning system at your fuse box, or flip the switch next to your furnace. To confirm power is off, try to turn on heating or cooling by adjusting the temperature on your old thermostat. Remove the face plate using a screwdriver or by pushing the pressure latch. Some face plates pull off while others need to be released using a screwdriver.

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Can you hook up two amps to one capacitor So if you first step in your home’s current drawn by using. They can use the second floor and out of thermostats called for volt hot water on one furnace. I’m pretty much switches, you will raise a few hours, so only one is to it is dividend into the cool. Have two wire hook them with a new thermostat. When you can be to the simplest setup for example, you could install a home, then stay down 5 degrees. Ac is still be a wood stove installed to install an old heater or aux heat. A thermostat thermostat in summer and the heat. This for the current drawn by a two-stage ac and cooling, so only have two separate thermostats can turn off the bedroom 2.

Most homes in North America consist of multiple zones or spaces for different purposes. All these zones need to be heated or cooled — but not necessarily at the same time.

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Two Thermostats controlling 1 furnace

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Two Thermostats, One Zone

Thermostat Camera. Doorbell Alarm System Lock. Sensors Compatibility. Reviews Announcement. Two nests in the same house? We just installed a nest in our home and it’s working great right now while we need heat. I’m debating the next move in my hvac setup and I’d like your advice.

Rotate image Save Cancel. Breaking news: See More. More New Posts. Search this thread. Thermostats generally don’t fail but the cost is significant when it does.

Remember Me? Results 1 to 11 of Two Thermostats – One furnace. Thread Tools Show Printable Version. Two Thermostats – One furnace Hi- An issue we are having in the colder months is the following: The main room where the thermostat is drops to The heat kicks on to reach

Jarosz Customer asked a question. Can I plug both of these into Nest learning and get down to one thermostat? Based on the wiring information you’ve provided, the Nest Learning Thermostat may work for this set up. The only issue would be the G wire for the furnace side. The Nest Learning Thermostat is compatible with dual transformer systems that have separate power for both Heating and cooling, however the G terminal on the Nest would be for the AC side and not the Heat side. So to make this possible, the G wire for the heating system would most likely need to be combined with the W wire on the back end so you only have Rh and W for heat and Y,G and Rc for cooling. I was off by one box for the green and white wires.

Sometimes we get calls from people who want to know if they can wire multiple heaters to one thermostat. Steve in our Tech Support Department says most of the time people want to wire multiple heaters to one thermostat for the sake of convenience. The temperature in both rooms would be determined by the temperate of the bedroom with the thermostat. That just defeats one of the advantages of electric heat: Still reading?

How to Zone a Forced-Air Furnace and Air Conditionerp{text-indent: 1.5em;}

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