Question about Honeywell CT87B ROUND HEATING&COOLING MECHANICAL THERMOSTAT - WHITE Heater

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RTH6300B Honeywell Thermostat

I am having the same issue. My husband installed the thermostat last November and took us a little to get the heating on, but it finally worked. Now that the weather is nice, we went to put the air on, and only warm air is coming out. I called Honeywell, and spoke with someone who had me go in a swith the cool setting, but it still is warm air. My husband checked the wires which are also, GYRB with a jumper between the R and Rc. Any ideas what else we can do?

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My air conditioning does not turn on at the time i want it on. previous owners had set timers for it to turn on, how do i re-set the timer as we do not want the timer on. we want to be able to turn it on and off as we please.

Posted on Aug 31, 2009

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Hi I honeywell,rth63oo b electronics thermo stat how do o change the accuracy from + - 1% to + - 3% Thankx


The following are the two manuals for ths product, I looked briefly and didn't see an answer to your wuestion. If you want to change the number of degrees between heating and cooling operation from 1 to 3 degress that can be found in the operating manual, under programming. 69-1723 - RTH6300B - Programmable Thermostat Operating Manual
69-1717 - RTH6300B Programmable Thermostat Installation Guide

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Honeywell RTH6300B to replace Trane Baystat 239


Sad to say but you have bought an non compatible thermostat, what you need is a thermostat that has "Heat Pump" somewhere on the package, Honeywell makes those also in the same models, sometimes they can be tricky if your not looking. It should also say 2heat, 1cool too. Hope this helps and good luck!

May 23, 2010 | Honeywell Focus 6300B 5-2 Days...

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I'm replacing an old thermostat with a new Honeywell RTH6300B programmable. I have propane heat and central AC. My old thermostat has a black, a red and a yellow leads with no ID on the old thermostat wall...


Open up the propane furnace and see what color wires are hooked to the gas valve or circuit board. If it has a circuit board, note which color is on the R terminal and W terminal, Connect the the thermostat the same way. Most likely the yellow wire powers your A/C so you can hook that one to the Y terminal.

Nov 27, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

Forced Hot Air Heating system doesn't maintain thermostat setting


It sounds like you may have issues with the furnace. A qualified professional can go over the system and the house to let you know if the system and unit are properly sized. The poor performance of a furnace can be a sign of carbon buildup in the furnace.
Good luck, hope this helps.
Matt

Jan 10, 2009 | Honeywell Focus 6300B 5-2 Days...

1 Answer

RTH6300B - Not blowing the hot air


I currently have a 2 wire system. I have one red and one white. I hooked the red to the R and the white to the W. I had to go into the system setup using the UP arrow button and the FAN button. The first setting is the 1 setting, and I selected number 2 ( Heating Only ). Then the 5 setting. I selected number 1 ( Gas/oil steam or gravity system ). Then 14 is usually 0 for Fahrenheit. I was just messing around and that is the buttons I used and I tested it. The furnace kicked on and then 10 to 15 secs later the air began to blow through the vents. I hope this works for others who read this.

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1 Answer

Wiring a thermostat


what kind of system are you hooking it to? heat pump or heat/ac?

Mar 08, 2008 | Honeywell Programmable Thermostat Heater

2 Answers

Honeywell 6300B clicking noise


I have the same model, and am also experiencing the clicking.

Jan 21, 2008 | Honeywell Focus 6300B 5-2 Days...

3 Answers

Honeywell 5+2 day programmable thermostat will keep heating to 29 degrees!


Is sounds like you wired it correctly, The black is a little unusual perhaps its blue, anyway, try disconnecting the wires from the thermostat and see if it shuts off. If so, then it may need to re calibrated. I will need some more info to help you anymore.

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