Your system has 2 stages of heat. Therefore you should have a 2 stage tstat. The 2510 is 1heat/1cool, put your w2 wire in with your w1 wire, you will be fine.
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SOURCE: Old thermostat wiring doesnt match up with new thermostat
Look at the instuction booklet (or on the T-stat board) for a switch for the reversing valve.
Some systems reversing valves are in cooling mode when energised, some are in cooling mode when NOT energised.
You are looking for the switch (Usually very tiny, or a different jumper setting) that will change the position of the reversing valve when calling for heat/AC.
This is not a switch like the typical "ON OFF AUTO, HEAT COOL EMG HT switches. It will be on the board itself or the back of the T-stat.
SOURCE: Thermostat Wiring: W2? E? Where to connect?
You have a heat pump. You need a thermostat for "Heat pump with Electric back-up heat". Make sure the 'stat has either an "aux" (auxilliary heat) or an "E"(Emergency heat) terminal. The wiring instructions will be provided with the thermostat.
SOURCE: I Have a honeywell RTH2410 Thermostat I wired it
What was the old thermostat labels and the wire colors that went to them?
The typical heatpump wiring Terminals are:
R = Red = Hot side of Transformer
C-B-X = Common side of transformer Depending on brand of heatpump
Y = Yellow = Cooling Contactor
G = Green = Furnace Blower
O = Orange Reversing Valve Energize to Cool
B = Blue Reversing Energise to Heat Depending on brand of heatpump.
W2 = White = Auxiliary Heat
You need to be sure where each wire comes from when you connect them to the new thermostat.
The best way to do that is to go to the furnace and see where they are connected. R-Y-G are probably correct, you need to see where the Blue wire comes from and determine what the X terminal was on the old thermostat.
SOURCE: Need wiring diagram for Honeywell RCT8100
The old thermostat has a second stage heat which is W2. The new one doesn't have second stage heat.
The wiring your describing on the old thermostat is telling me you have a heat pump with second stage heat and the new thermostat is for air conditioning only. You will need to get a thermostat for a heat pump.
SOURCE: My Honeywell Programmable Thermostat RTH2410
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Hi,
You need to reset the t-stat and totally reprogram it...
Look in your manual how to do that or...
Here is a tip that tells you how to get a manual for most any Honeywell product
online...
Manual Honeywell How to Find Honeywell Manuals
heatman101
Testimonial: "Manual said nothing about reset procedure. However I started programming from the beginning and all is well so far. "
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