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Honeywell Programmable Thermostat 5-1-1 Day RTH7400D user manual

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Honeywell RTH230B

This my situation exactly.  Changing from a 6 wire manual round Honeywell thermostat to a 5 wire Honeywell programable.  Is there a way to maintain all functions?

Posted on Nov 25, 2008

  • 1 Answer

SOURCE: rewire an old 2 wire thermostat to a honeywell 5-1-1 programmable

I connected the blue wire to the R and the white wire to the W on the old thermostat and shoved the new Honeywell 5-1-1 Day programmable thermostat up the first guys *** that i ran into at Canadian Tire

Thanks for your help

Posted on Dec 29, 2008

  • 2 Answers

SOURCE: switching thermostat from farenheit to celsius

My thermostat was set on celsius and couldn't get it to change back to fahrenheit. My son suggested pressing both up and down arrow buttons at the same time and it worked. It changed back to fahrenheit.

Posted on Jul 27, 2009

SOURCE: Honeywell Thermostat RTH7400D

The thermostat will not cut off the A/C until the thermometer reading gets to 76.

If there is not a heat source near/behind the thermostat which is causing the thermometer to read higher than actual room temperature, it sounds like the thermostat thermometer is out of calibration.

There are ways to calibrate it, but much to involved to go into here.

One solution is to just set the thermostat at 80, knowing that it's really set on 76.

Another solution is to replace the thermostat.

Charlie

Posted on Aug 14, 2009

billyvangogh
  • 108 Answers

SOURCE: need to wire a honeywell RTH7400D thermostat to 3 wire hot water

Just mark the old wires on the old thermnostat...R , W etc...and put them on the same terminals on the new 1.....also there should be some adjustment ire : switch on the back or under the cover to adjust for Hot water heating or electric heat...either is the setting you should have it on....also you shouldn't setback the thermostat at night or when away very much....2 degrees is fine , as the boiler will run along time to raise the temperature in the morning and may not get there by the set time

Posted on Oct 26, 2009

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1 Answer

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Normal 0 MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman";} Hi,
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Need to wire a honeywell RTH7400D thermostat to 3 wire hot water


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Rewire an old 2 wire thermostat to a honeywell 5-1-1 programmable


I connected the blue wire to the R and the white wire to the W on the old thermostat and shoved the new Honeywell 5-1-1 Day programmable thermostat up the first guys *** that i ran into at Canadian Tire

Thanks for your help

Dec 28, 2008 | Honeywell Electronic Programmable...

3 Answers

Switching thermostat from farenheit to celsius


My thermostat was set on celsius and couldn't get it to change back to fahrenheit. My son suggested pressing both up and down arrow buttons at the same time and it worked. It changed back to fahrenheit.

Feb 16, 2008 | Honeywell Programmable Thermostat Heater

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