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I'm trying to wire my honeywell t8011 thermostat

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Go to the breaker and carefully throw it fully to the off position, and then back on. Sometimes they look on, but are off. If it was already on, it should also reset anything that needs reset. Pull the thermostat off the wall, and check all the connections. Wiggle the wires around. Pay careful attention to the Red and white ones. One of them could be broken off inside the insulation. Look for a suspiciously flexible place in the wire. Red is power from the transformer, and white energizes the heat cycle. Enough power to run the thermostat bleeds through it. 

You might look inside under the cover for the filters. If you see a red button, it may be the reset.



Usually there is a 24 volt AC transformer in the furnace with the secondary winding connected to a red wire running to the thermostat and a blue wire to the gas valve, A/C relay, and fan relay. From the thermostat there will be white wire to the gas valve, yellow to the A/C, and green to the fan. The thermostat is wired to switch the power from the red to the white, yellow, and green as needed with the blue completing the circuit. It may be wired to have the control wires return to the furnace and its controls and then a second wire goes to the A/C unit. Internal wiring may replace the green wire if the thermostat does not give you the option of fan only or continuous fan.

The W1, 2, 3 likely are for 2 stage heating replacing the W in simpler thermostats. C may be a hot common often labeled RC and jumpered to the R. The L, O, X, and E may be connect to an outside temperature sensor, logic on the furnace control board, or externals such as a electronic filter. If you didn't get any instructions with the thermostat, you have to check Honeywell's web site or call their tech service.

click this link for more help http://www.askmehelpdesk.com/interior-home-improvement/help-wiring-honeywell-t8011-digital-thermostat-8865.html

Posted on Nov 30, 2008

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Sir please specify your issue?

Posted on Nov 30, 2008

  • cmr4skulls May 30, 2011

    Well my heating & ac unit in my double wide home,the Ac will not cut on unless i turn it on emerg. air. Had a guy tell me it was my relay in the unit outside,if so how do i go about changing it??

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