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How to replace light bulb in my honeywell thermostat? Model # RTH5100B?
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- 1 decade agoFavorite Answer
Usually these are permanently soldered to the thermostat, and requires replacement of the entire device in order to get a new bulb, especially those that use LCDs.
Hopefully replacement of your device isn't too costly, I replaced several thermostats in my house for under $40. If you are feeling thrifty and it still works, I suggest living without it.
Source(s): replaced my own, and others, throughout my lifetime
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