Honeywell RTH6400 Support Questions
View all Honeywell RTH6400 questions
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All Honeywell Questions
Honeywell - I Got Honeywell Rth6400d I Would Like To Programed In Celsius
(Posted by joezizic1 2 years ago)
Honeywell - Can I Change From Fahrenheit To Celsius? On Honeywell Rth 6400 ??
(Posted by shema1 2 years ago)
Honeywell - How To Change To Celsius
how to change my honeywell rth 6400D to celsius?
how to change my honeywell rth 6400D to celsius?
(Posted by spazzkatz 3 years ago)
Honeywell - Ambient Temperature Display Units
can you change the ambient temperature fron Farenheit to Celcius ?
can you change the ambient temperature fron Farenheit to Celcius ?
(Posted by laertica 5 years ago)
Honeywell - How To Open To Replace Batteries
How to open RTH6400D to replace batteries
How to open RTH6400D to replace batteries
(Posted by winston932 7 years ago)
Honeywell - Rth6400d Wiring Question
My old thermostat had a black wire going to terminal C. Where do I put the black wire on my new HW R...
My old thermostat had a black wire going to terminal C. Where do I put the black wire on my new HW R...
(Posted by imagine585 7 years ago)
Honeywell - Run The Schedule
I have followed the instuctions to have the schedule run on my thermostat. but it will not. I push d...
I have followed the instuctions to have the schedule run on my thermostat. but it will not. I push d...
(Posted by smarti22 9 years ago)
Honeywell - How To Change My Display To Celcius
how to i change my display to celcius on my honeywell RTH6400
how to i change my display to celcius on my honeywell RTH6400
(Posted by perrynaclia 10 years ago)
Honeywell - Honeywell Rth6400 Series
I have mine set 4 ways througout the day. 78 for day and at 4:00 pm to change to 75 and 10:00 at nig...
I have mine set 4 ways througout the day. 78 for day and at 4:00 pm to change to 75 and 10:00 at nig...
(Posted by sready6 10 years ago)
Honeywell - Temerature Conversion
How do I change the display to read Celsius?
How do I change the display to read Celsius?
(Posted by boydsr135 10 years ago)
Honeywell - I Not Sure My Connection
i have 4 wire, red, green, white and the orange.how connect wire correctly
i have 4 wire, red, green, white and the orange.how connect wire correctly
(Posted by steevebeaudry 11 years ago)
Honeywell - Hold Button
If you change the temperature and push the "hold" button, how do you release the "hold"?
If you change the temperature and push the "hold" button, how do you release the "hold"?
(Posted by pomalley012617823 11 years ago)
Honeywell - I Installed A Honeywell Rth6400d Thermostat In My Home
I installed a Honeywell RTH6400D thermostat in my home and when I installed it found that the heat w...
I installed a Honeywell RTH6400D thermostat in my home and when I installed it found that the heat w...
(Posted by barrycurcio 11 years ago)
Honeywell - Temperature Setting
do I have to set the temperature for each day of the week or can I just set one temperature for the ...
do I have to set the temperature for each day of the week or can I just set one temperature for the ...
(Posted by pomalley0126 12 years ago)
Honeywell - Is It Possible To Change Temperature Readings From Degrees F To Degrees C?
(Posted by donsallyf 12 years ago)
Honeywell - User Guide
Need to download RTH 6400 user guide can you help
Need to download RTH 6400 user guide can you help
(Posted by rabinthims 12 years ago)
Honeywell - I Have A Honeywell Thermostat Ct3600a4451 How Do You Get 'filter' To Stop Flashi
(Posted by crayt77 12 years ago)
Honeywell - C To F On A Honeywell Rtc8100
How do you change from Celcius to Farenheit on a Honeywell RTC8100?
How do you change from Celcius to Farenheit on a Honeywell RTC8100?
(Posted by aleal57 12 years ago)
Honeywell - Temperature Time Inbetween Run -off And Star Up Agin , How To Set That
the furnace come on to temperature shuts off and comes on again in10minutes can a time be set in the...
the furnace come on to temperature shuts off and comes on again in10minutes can a time be set in the...
(Posted by utheilen 12 years ago)
Honeywell - Need Programming Instruction For Honeywell Thermostat Model # Ct3451a
Need programming instruction set time and temp for this unit
Need programming instruction set time and temp for this unit
(Posted by bronek 12 years ago)
Honeywell - Thermostat Problems
buttons wonk work. screen is displaying a 1 and 0
buttons wonk work. screen is displaying a 1 and 0
(Posted by Anonymous-29335 12 years ago)
Honeywell - A/c Is Always On.
I'Ve installed a RTH6400 thermostat. I only have four wires, no yellow and I left the little brigde ...
I'Ve installed a RTH6400 thermostat. I only have four wires, no yellow and I left the little brigde ...
(Posted by sydkaero 12 years ago)
Honeywell - How To Connect The 2 Wires From My Existing Thermostat?
I just bought a Honeywell RTH6400 series thermostat but I have problems to connect it. My old 24v th...
I just bought a Honeywell RTH6400 series thermostat but I have problems to connect it. My old 24v th...
(Posted by huguessimard300 13 years ago)