What is ob on a thermostat

Upon first installing your thermostat, if heat is coming on instead of AC, it may be due to incorrect wiring or an incorrect configuration. If this is happening, please remove the ecobee thermostat from the wall and check the following.

Log in. Sign up. JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. Nest and Ecobee both told me it wouldn't work. Can anyone help me?

What is ob on a thermostat

This thermostat is the master in a 3 zone system - no heat pump, forced air and oil heating but we still have o and b wires. Now I am stumped as the master has the following wires in the photo :. B wire is Blue and O wire is Brown. Go to the Recommended Answer. There is no affordable zone controller that will handle three HVAC equipment. You will need one zone controller for each of the air handlers that has dampers in the ducts. The smart residential smart controllers I prefer are the ecojay SmartZone 4X. View Recommended Answer in original post. The reason I prefer the EcoJay SmartZone is they will allow any zone thermostat to activated the system and thermostat 1 is still the priority thermostat. Additionally they are capable of Supporting the Nest Thermostat in heat pump duel fuel mode. They are easily configured and programmed. As to those O and B wire, you will not need them. With the ST-2E there can only be 1 master thermostat. No other thermostat can change the system mode. Using Nest Thermostats connected to the EcoJay 4X, priority is given to thermostat 1, however, if thermostat 1 is not calling for heat or cooling, any other thermostat attached can make the call for heat or cooling.

Replies are disabled for this topic. Help Sign In. The C-Wireor common wire, is essential for smart thermostats, like the Nest thermostat.

Note: This post was originally published on June 27, If you have both an Rh and an Rc wire, the former powers the heating and the latter powers the cooling using two separate transformers. If, for example, you have an R wire and an Rc wire, the R wire controls the heating system. G: This wire controls the blower fan, which is responsible for pushing the warm or cool air through all the vents in your house. It is not a ground wire!

Understand how it impacts your HVAC system. Explore troubleshooting tips and installation guidelines. Many of the links in this article redirect to a specific reviewed product. Your purchase of these products through affiliate links helps to generate commission for Storables. Learn more. Understanding the intricacies of a thermostat can significantly impact the comfort and efficiency of a home's heating and cooling system. This wire, often overlooked, is instrumental in ensuring that the thermostat effectively controls the heating and cooling functions of the HVAC system. This wire is often colored in various shades, such as orange or blue, to facilitate easy identification during installation and troubleshooting.

What is ob on a thermostat

Home Knowledge Base. Thermostats act as the command center for heating and cooling systems, and their wires are like the hidden messengers. Generally, a wire is connected to each control point within the HVAC system. These wires are typically color-coded to simplify the setup. The C-Wire , or common wire, is essential for smart thermostats, like the Nest thermostat. Without it, maintaining Wi-Fi connections and providing consistent functionality would be a challenge. A traditional thermostat might not need a C-Wire but adding a smart thermostat without one may require some additional wiring.

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Navigating the intricacies of thermostat wiring, particularly the OB wire, can be perplexing. Thanks so much for the offer for realtime help - I may take you up on it for a case of beers The Jumper between R down to R1 does not make sense. You definitely need to consult the manual for your HVAC where the other end of the wires connect and look at where they attach on that board. This information should help you see how to connect it. Next Continue. Note: This post was originally published on June 27, I assumed the P must be a rubbed off R and V may be a rubbed off Y. Identify the wires and their corresponding terminals on your old thermostat using the user manual or labeling. So on my new honey well thermostat I connected the y g w and rc but there is no rh to connect with the rc but there is an r terminal on the new one. This is NC Now some damper motors use a spring to close so those motors do not need M6. Sort by Oldest first Oldest first Newest first Most reactions. Appreciate all the help!

The O setting in setup is the most common. When setting up a new thermostat, and you select O, the heat pump should cool while in the cool mode. This might sound silly, but it depends on what climate your unit was manufactured for.

It is not a ground wire! You definitely need to consult the manual for your HVAC where the other end of the wires connect and look at where they attach on that board. Skip to content. The M1 common is wired internally from the Transformer Common block terminal 1. O and B control the heat pump reversing valve. The O wire usually signals the heat pump to switch to cooling mode, while the B wire does the opposite—telling the system to heat. I would assume The Y terminal is what activates the compressor. I have EWC ST 2E right now cant upload photo, will try to do it on the original post , we have three ACs and three handlers, 2 Tstats that are masters and three slaves. S, S1, S2: These wires run directly outside and provide outdoor temperature information to the thermostat. The Jumper between R down to R1 does not make sense.