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Question About Honeywell Thermostat RTH221B
Owner's Manual for RTH221B...

I'm looking for a wiring diagram to install this thermostat on my home's central heat/air unit.

Asked by Steven on 10/16/2009 3  Answers

ManualsOnline posted an answer 15 years ago

The ManualsOnline team has found the manual for this product! We hope it helps solve your problem. Get the Manual Here

Steven posted an answer 15 years ago

1 I found it on the Honeywell website. Here is the English version: http://www.honeywellcentral.com/ssi/pdf/honeywell/RTH221-Owners-Manual.pdf
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Steve posted an answer 14 years, 11 months ago

0 lost screw on bottom of plate; tiny locking screw. anyone know size? shask@aol.com
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Nick posted an answer 14 years, 11 months ago

0 It does not control this oil burner.The burner is on a short cycle, on every 10 minutes,run for 2.5 minutes.The old system has two wires both white.
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