SOURCE: problem with Honeywell RTH230B Thermostat
Sounds like you have it wired wrong.. Pop the top off and give me to color of the wires and tell me which letter each color wire is on.. that will tell us right away if you have it wired wrong
SOURCE: cannot set heat setting by using "hold" feature
make sure it is not telling you room temp, some of the Honeywells, will display room temp over desired temp. check that, if it wont let you switch temp than buy a new one, if you dont have a heat pump a new cheap stat is around 20.00.
SOURCE: how to remove thermostat cover to replace
the cover pulls off if it has a green screen then most likely takes batteries if does not light up then no batteries with a small piece of insulated wire jump from green to red if indoor fan does not come on then transformer bad
SOURCE: Unlock a Honeywell Thermostat
here is the link to get a manual for your particular theremostat.
http://yourhome.honeywell.com/yourhome/CMSTemplates/SolutionByCategory.aspx?NRMODE=Published&NRNODEGUID=%7bBE070174-CDA8-4628-8D04-7598F09C71E1%7d&NRORIGINALURL=%2fConsumer%2fCultures%2fen-US%2fProducts%2fThermostats%2fDo-It-Yourself%2fProgrammable%2fDefault%2ehtm&NRCACHEHINT=Guest
SOURCE: Incorrect ambient temperature on Honeywell Model RTH221B
Check in your manual for the thermostat. By pushing a combination of buttons you can get into the advanced installer menu. From there you can make an adjustment to correct the temperature.
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