The nest gets its battery charge from R to Y1. If the Y1 line is broken it won't charge. Y1 is the wire that goes to the outside A/C condenser.
What does a Y1 loss on the nest mean?
It would be really helpful to see your wiring on the nest. Can we assume there is no C connection? A Y1 loss means a break in the wiring somewhere from the stat to the contactor in the outside condenser.
What is the difference between Y1 and y2 on Nest Thermostat?
In heat pump systems, Y1 controls your compressor, which heats and cools your home. If you have a two-stage compressor, Y2 controls your compressor's second stage, allowing for different levels of heating and cooling. G or G1 controls your HVAC fan. Also Know, what is the difference between RH and RC on Nest thermostat?
How does the Y1 line work?
So as long as there is a wire in the Y1 terminal..... the charge is handled thru the Y1 line. If you have a low charge the pressure switch will open the Y1 circuit. When you add a direct C connection to the nest it no longer needs to steal power.
What is y1 and y2 on a heat pump?
In heat pump systems, Y1 controls your compressor, which heats and cools your home. If you have a two-stage compressor, Y2 controls your compressor's second stage, allowing for different levels of heating and cooling.
How do I fix Nest error Y1?
The Y1 wire is actually just for cooling. It appears that error code often indicates too much voltage on the wire. This could be a problem with the HVAC system rather than the thermostat. If this is a new Nest installation verify the wiring to ensure it is correct.
Should I use Y1 or Y2?
In conventional cooling systems, Y/Y1 controls the first stage of cooling and Y2 controls the second stage, which helps cool down the home faster. In heat pump systems, Y1 controls your compressor, which heats and cools your home.
What is Y wire on thermostat?
Y - This is the terminal for cooling or air conditioning and goes to the compressor relay. Typically a thermostat wire pull is made to the air handler on split systems and then this wire is spliced for the separate wire pull which is made to the condenser.
Where does y wire go on Nest?
0:456:05Nest Thermostat Wire Colors [Explained] - YouTubeYouTubeStart of suggested clipEnd of suggested clipThe Y wire is yellow. And that is the cooling wire or AC wire. So that controls your HVAC. System onMoreThe Y wire is yellow. And that is the cooling wire or AC wire. So that controls your HVAC. System on the AC. Side. So your air conditioning.
Is Y1 thermostat same as Y?
In most systems, the Y or Y1 wire controls your cooling system. If you have a heat pump, your Y or Y1 wire controls your compressor. Your compressor is responsible for heating and cooling your home.
Does y wire go to Y1 or Y2?
Y, Y1, Y2: Whenever your thermostat calls for cooling, the Y wire is used to send a signal to your HVAC system telling it to fire up the air conditioner. Y1 and Y2 wires might be used instead if you have a two-stage system (i.e. a high level for extremely hot or cold days, and a low level for mild days).
Is Y wire the same as C wire?
Yes, you can swap out and reuse the Y wire as a C wire, since you don't have an air conditioner. Or use the capped off wire (that's probably better). hey're just copper wires, and there's no firm color code anyway.
Can I use Y wire as C wire for thermostat?
Correct. The C wire needs to go out to any separate equipment to complete the signalling circuit. One wire (like Y) provides the switched signal from the thermostat and the C wire provides the "return path" for the voltage.
What color is the Y wire on a thermostat?
yellowThermostat Wiring Tips If your thermostat controls your heat, you will have a white wire. The Y wire is yellow and connects to your air conditioning compressor. The G wire is green and connects to the fan. Rc and Rh: The red wire(s) are the power source for your thermostat.
Does Nest need RC and RH?
The Nest Thermostat E only has an R connector, which is typically where an R wire would go. If you have separate heating and air conditioning systems, you might have separate Rh and Rc wires that come out of the wall and are connected to your system.
What happens if you wire a thermostat wrong?
Potential consequences of improper installation could include: Electric shock. Blowing a circuit breaker. Damaging the thermostat unit, the electrical system or even the AC/furnace unit itself.
What if there is no C-wire for thermostat?
If your current thermostat didn't need a C-wire, it (or a wire that can be used as a C-wire) might be rolled up inside the wall. This is more likely to be true if you see all the other color wires present. Line voltage thermsotat scenario: you have just two wires (white and red, probably), and they're thick.