Honeywell wall thermostat wiring diagram - A few programmable thermostats (e.G. Honeywell prestige wiring requirements) need a minimal of five wires, and maybe more relying on what features you want to operate (humidifier, and so forth). The extra 5th wire might be for commonplace; imparting stepped down power from a transformer. Going into your furnace might also sound intimidating, but when you have the basic knowledge of wiring, and recognise how to get rid of the right furnace panels to access the electronics, then you need to be fine. The com 24v terminal might be related to the c (24 vac common) of the thermostat. Observe: a previous installer might also have used a exceptional set of shade wires. This will be a non trouble to maintain music of if a whole new set of thermostat wires is pulled. Otherwise tag the wires before removing from the present thermostat, or take note of the terminals every wire is attached to.
In a situation where the original thermostat wires may have been stapled to an indoors wall stud, and no longer run via conduit, you'll be better off leaving the existing set of wires, and slicing them off on the entry and go out points of the wall. Then feed new wires with a fish tape (klein gear). Take a look at your local home improvement stores, or nearby device condominium, for condo availability. For people who choose to see an actual wiring schematic or diagram when wiring up a room thermostat, the ones illustrations are supplied here to help understand what wires are being related and what every cord is doing. If you have easy get admission to to the existing thermostat wires, simply get rid of and comply with the identical course with the brand new set of wires. You could use cable ties, electric tape, or staples (securing wires and cables article). Be sure to take a very conservative dimension on how long your new set of wires should be. You don’t need to begin over, in case you arise quick.
A: in case you plan to upgrade to a brand new thermostat make sure you've got the proper number of wires to be had, otherwise your new thermostat received’t paintings (most advanced honeywell thermostats require a not unusual (c) cord to energy on). In case you do want additional wires, you may need to keep in mind how hard installing new wires could be on your application, and in case you need to budget for an electrician or hvac tech to put in the proper wiring.