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zacharys317
Nov 23, 2007, 10:31 PM
I have a Honeywell RTH230B and sometimes it will cycle on and off for an hour. What's wrong and how do I fix it?
hvac1000
Nov 24, 2007, 03:42 AM
Programmable heating and cooling cycle lengths: 10, 12, 15, 20
or 30 minutes.

Read all about it here. Left side under introduction.

http://customer.honeywell.com/techlit/pdf/69-0000s/69-1800.pdf