my old thermostat 6 wires, Does this thermostat compatible with my system?
1552482
This thermostat is for the in-floor heating wires. It is not designed to control the heating system of your house.
918901
You need 5 wires for this, but have options. First, I'd pull the thermostat and check the cable closely. There may be a 5th wire in the cable (not used on your old thermostat) that's been cut off or pushed back into the wall. If not, you can use the "Venstar Add-A-Wire 5 Wire to 4 Wire Adapter" to avoid having to replace the cable. You can download the manual to check color code and compatibility with your unit.
395707
Not sure but I hook this up with my new high effisance furnace and my installer did not have to do any extra work from my 20 year old thermostat. It works really great. Sorry I can't help more
1889336
It worked for me. There are instructions about where to put the 2 wires. It's just a relay closure. But, when I asked Honeywell about it I got an answer from someone who apparently was clueless about electronics. But, I used it on a system with ~ 15 volts to the relay and it was fine. That was about 6 or 7 years ago. Now there are "millivolt" thermostats. Some systems have a very low voltage sent to the relay. I don't know if the (thermo)stat you're asking about will be used in in such a system. If so, better check. My system was very old. But, basically, yes, only two wires are needed.
920389
No. You just have to make sure the connectors to your existing thermostat are compatible with this one. You can look at the one you have now and see if it is not by the online compatibility. I did not. And mine was not compatible.
101074
Depends on how many wires , your voltage and wattage. This thermostat uses a two wire setup. It seems like you might have 4 in which case it wouldn't work. Maybe check out the Honeywell site for more specific information and the manual on it.
717869
If you search for the wiring instructions for the Honeywell RedLINK system (example: Honeywell document 69-2091EFS), you can see the required wiring hookups. This should allow you to assess compatibility. If you are already using a modern (digital) thermostat, you should be able to install the RedLINK system without too much trouble. However, keep in mind that this system is intended to mount on or near the existing HVAC system, not at the location of the thermostat. So having access to your utility closet will be helpful.
92311
this switch is for a 4 wire system - I would look for another model to accommodate a 6-wire system.
2221043
as long as the temp slide and switches are in the same places and have the exact same functions then yes they are both analog thermostats and should mate with the board up in the unit. be sure to turn off the breaker going to the unit in question before you touch th old thermostso you don't short and blow the upper control board while changing out the thermostat and wires accidentally touch. good luck. TTFN GLENN
955985
I would look at the wiring just to double check. But if the new thermostat fits the current wall mount then I would say no rewiring is necessary.
2221045
as long as the temp slide and switches are in the same places and have the exact same functions then yes they are both analog thermostats and should mate with the board up in the unit. be sure to turn off the breaker going to the unit in question before you touch th old thermostso you don't short and blow the upper control board while changing out the thermostat and wires accidentally touch. good luck. TTFNGLENN
433467
It needs two wires for 24volts. Just installed one at my home. It's a great thermostat and the install is not difficult, just give yourself an afternoon to make it look nice. Make sure that the control unit can be mounted at least two feet from the thermostat.
1406055
If the existing thermostat just closes a low voltage circuit it should work. That's most two wire thermostats. The only other considerations are the minimum run time and the low & high set point. You can adjust the temp spread on this unit using jumpers inside it.
616494
If there are 2 leads, it should work. You will need to install a GIF prior to the thermostat.
1354707
I think you might need the next model up (with a W2 terminal) for your system: TH6220D: For up to 2 Heat/2 Cool systems
430751
Most, if not all, of the thermostats you will encounter have been color coded for commonality. So yes, you should use the RWGY terminals. If it is at all possible, try to verify what those original wires are for. For example, the G wire might be for the fan. Is there anything in the manual that says the G terminal is for the fan? If so, this is the correct terminal.Good luck and enjoy saving $$ with the new timer system!(I apologize for taking so long for this response)
495277
I replaced an older model and it works fine. I'm sorry I recall the model number of the older unit. My bet is it would work, and it was easy to change the wires from one to the other.