Table of Contents
Does Goodman heat pump use O or B?
A Goodman reversing valve is usually powered during cooling using the thermostat’s “O” terminal output. If the thermostat is set to “Cool” mode, you can check to see if it is putting out 24V on O.
What is the purple wire on a Goodman heat pump?
See if it runs. If I’m understanding this right this is a new install where you pulled the purple wire off the NC point of the relay that is on the board to stop the fan. That means the purple wire should go to the heat relay and should only have power if the heat relay is engaged.
What color wire is emergency heat?
Thermostat Wiring Color Code Chart Marking Wire Color Code Description W White Primary heat cell relay E Brown Emergency heat relay Y Yellow Primary cool call relay Y2 Yellow Secondary cool call relay.
What color wire goes where on a thermostat?
This is the most typical thermostat wiring style, and it applies to systems that regulate both heat and air conditioning. The wires are typically arranged as follows: red for 24-volt hot, white for heat, yellow for cooling, green for the fan, and blue for common (although the common wire may be a different color).
How many wires does a heat pump thermostat have?
In heat pump system, there are at least 8 wires that need to be connected to the thermostat for proper operation.
What are the wires on a thermostat?
Thermostat Wiring Tips The W wire is connected to your heating system. 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 my heat pump use O or B wire?
Your heat pump uses O and B wire. O wire shift the reversing valve from heating to cooling while the B wire does the opposite (Cooling to Heating). The O and B wires are easy enough to spot because they are ‘Orange’ and ‘Dark Blue,’ respectively.
What is the L wire on a heat pump thermostat?
L: This terminal is designated for indicator lights on the thermostat, sometimes for when auxiliary or emergency heat is turned on, or if there’s a general problem with your system.
How do I know if I have an O wire or B wire?
Check if your thermostat has a C connector Whether or not there is a wire attached to it, if your thermostat has a separate connector labeled C in addition to a connector labeled B, then the wire in the B connector should be connected to the Nest thermostat’s O/B connector.
What is B on heat pump?
The O/B terminal is for heat pump systems and is used for the reversing valve. If the “B” option/position is selected the reversing valve defaults to the cooling mode. It is extremely import that the correct mode is selected. If you get it reversed the heat pump will cool in the heat mode, and heat in the cool mode.
What does O B on cool mean?
Check your configuration. Most commonly, O/B is energized in Cooling (O on cool). For Rheem or Ruud brand heat pumps, the O/B must energize on heating (B on Heat).
What color is the C wire?
Blue wires are also called “C” wires because they are the Common wire. C wires are necessary for any “smart” thermostat that needs to be connected to a power source 24/7, regardless of your heat pump type.
What are the 5 thermostat wires?
5 Wire Thermostat Wiring (Any HVAC Device – Air Conditioners, Heat Pumps, Furnaces, etc.) Red wire for power (24V). White wire for heating (connected to W or W1 terminal). Green wire for fans. Blue or yellow wire for cooling (connected to Y). Black wire for “C” or “Common” wire.
Why does my thermostat have 6 wires?
If your system has six wires, it’s because it features second-stage heating, second-stage cooling or heat-pump cooling but not all three. The extra wire signals the additional function to come on. If your system has second-stage heating and cooling as well as a heat pump, then the thermostat needs eight wires, not six.
Does R go to RC or RH?
Here are some general guidelines: An R wire can go into a Nest Learning Thermostat’s Rc or Rh connector. The Nest Thermostat E only has an R connector, which is typically where an R wire would go. These are not jumper wires, and you can insert the Rc wire into the Rc connector and the Rh wire into the Rh connector.
What is the blue wire on a heat pump?
Blue wires are for heat pumps. This wire connects to terminal B on your thermostat.
What is W2 and Y2 thermostat?
Y2 – This is the thermostat terminal for cooling second stage if your system is so equipped. W2 – This is the thermostat terminal used for second stage heat. There are gas furnaces with low fire and high fire and some depend on control from a two-stage heating thermostat with a W2 terminal.
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 does white wire do on heat pump?
W Wire Terminal Designation – This color is typically white and goes to the W terminal. In a heat pump, this is for the backup heat source. Whether it is electric heat strips or a gas furnace (dual fuel), the W terminal controls this. This wire will also run to the air handler/furnace and the condenser.
