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Wiring diagram for a honeywell st6400c programer

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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  • 17 Answers

SOURCE: Honeywell ST6400C with no display

I am not familiar with this particular model but in general all digital thermostats are either powered by batteries or by the 24 volt transformer from the furnace. Usually the standard heat/cool type that you may have is powered by batteries and will show a low battery display for a few days before they go out entirely. You may have missed that warning because of your being away.
There will either be a small door on the front of the thermostat or you will need to pull the thermostat from the subbase and the batteries will be inside. Usually 2 AA size....replace with the good kind.

Good luck

Posted on Nov 14, 2008

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  • 17 Answers

SOURCE: replacing Honeywell heating progrmmer

yep the wires will hook up to the same designations, just write down what color was connected where. You will need to set the thermostat up for your particular situation...gas, electric, heat pump, ect. The installation maunel is very clear on this aspect so you should not have a problem.

Posted on Nov 14, 2008

  • 148 Answers

SOURCE: Honeywell ST6400C - hot water not working

some digital thermostats do no not work with zone valves is this a new thermostat that you had installed

Posted on May 10, 2009

wcrawf11
  • 52 Answers

SOURCE: I need a user manual for the Honeywell ST6400C

You should be able to get the informatiom you need here. http://ecc.emea.honeywell.com/products/ecatdata/pg_st6000.html

Posted on Dec 12, 2009

  • 1 Answer

SOURCE: User manual for Honeywell ST6400C

Honeywell ST6400C
Times set on thermostat does not turn on or off the heating or hot water at the set times, but any time of the day

Posted on May 20, 2011

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I have Honeywell st6400c. The heating runs all the time although I have switched off the programmer. I have just replaced the wired thermostat with a remote one. Could the wiring be incorrect


Start from scratch and do t hardest thing there is for any man to do......................STUDY the directions for the new components.
Sometimes it's THAT simple to correct a mistake. don-ohio (:^)

Jan 16, 2017 | Honeywell Heating & Cooling

1 Answer

Failure of my Honeywell CM61ng wireless thermostat. Replacement advice


Probably not. There are replacement models available.
The T6661B programmable room thermostat is also known as CM61.
CM61 1 day wireless programmable thermostat is replaced by CM921.
CM61 1 day wired programmable thermostat is replaced by CM901.

Oct 21, 2017 | Heating & Cooling

1 Answer

My st6400c Honeywell programmer blank. Mains turned of whole day. Now back on, but st6400c blank.


Have you tried pressing the 'Reset' button (with the tip of a pencil)? After doing this, you will have to re-enter the various times. It could be that your rechargeable battery is nearing the end of its useful life, by the way.
George

Feb 23, 2011 | Honeywell Programmable Thermostat Heater

1 Answer

St6400c thermostat wont run the central heating independantly


This does not sound like a thermostat problem. I would be looking for a zone valve or circulator pump problem.

Nov 05, 2009 | Honeywell Programmable Thermostat Heater

2 Answers

User manual for Honeywell ST6400C


Honeywell ST6400C
Times set on thermostat does not turn on or off the heating or hot water at the set times, but any time of the day

Sep 17, 2009 | Honeywell Electronic Programmable...

1 Answer

Honeywell ST6400C - hot water not working


some digital thermostats do no not work with zone valves is this a new thermostat that you had installed

May 08, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

No hot water honeywell st6400c


HW valve was stuck in the open posiion and the micro-switch was not working so thats why boiler and pump were not starting. Bled system to below the level of the valve to be changed, and replaced valve with a drayton ( easy quick change of valve head if needed no screws )

Sep 07, 2008 | Honeywell Programmable Thermostat Heater

1 Answer

Honeywell ST6400C programmer


Hi yes sound like it not working on hot water only it would check ou the wiring on this side

Jul 25, 2008 | Honeywell Programmable Thermostat Heater

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