Question about Honeywell Programmable Thermostat Heater

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Honeywell therostat wiring help

Have issue with long delays and heat and air coming on together. Wired exactly what they told me to do. replacing old Honeywell mercury with new digital.
Wiring:
OLD-NEW
R-R
Y-Y
W-AUX
C-C
jumpered E and AUX

HELP?

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  • elvin24 Jan 03, 2008

    i got a honeywell programmer model#rth6300b my heat dont stay on longer it turn off quick what i need to do

  • kozpg Jan 12, 2009

    i have a two wire 24 volt heat only system and just purchased a honeywell RTH 221B1000 thermostat. there are 5 places for wires , where do my two wire go?

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  • 115 Answers

Don't assume the wires at the thermistate are correct.

I had similar and had to go all the way back to the heat/AC controller board. I found the colors weren't attached per spec so was fighting the origional installation at the new thermistat.

Also some digital won't control mutizones proerly

Posted on Dec 19, 2007

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