Question about Honeywell PRO 3000 Non-Programmable Thermostat

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Honeywell pro 3000 battery died changed battery wont turn unit back on

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Posted on Jan 02, 2017

  • 13 Answers

SOURCE: batteries died on my honeywell RTH230B replaced but furnace won't

you will have to reprogram it according to the operating manual.
The manual is available on www.manualnguide.com

Posted on Feb 02, 2010

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I have a honeywell focus pro 6000 temp in house doesnt change unit runs constatly. thermostat says 78 thermomiter on other end of house says 72. changed batteries


It's possible you have a lot of dust build up inside the stat. If it has batteries remove face from wall and blow out. Take outside to see if temp will change. Plug the hole in the wall where the wire comes through. If all fails, replace. Turn power off, take wiring picture, replace, turn power on. Good Luck!!

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1 Answer

Batteries died on my honeywell RTH230B replaced but furnace won't


you will have to reprogram it according to the operating manual.
The manual is available on www.manualnguide.com

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I have a honeywell control unit that has a corrosion problem in the aa battery compartment, When I change the batteries every 12 months I notice it is getting worse. I put a new set of batteries in and the...


Your problem is bad connections due to corrosion. If you would do something to correct that you wouldn't need to replace anything. Batteries ooze acid when they go bad, to counteract that you need to apply a paste of baking soda with water on a used toothbush and scrub all the funky stuff away. Paper towels are good to wipe it off with until it's dry. Take a small file or a small piece of sandpaper and dress or shine up the metal parts that contact the batteries and then spray the parts with contact cleaner from Radio Shack. Your batteries need to be changed BEFORE they purge their innards all over your good work next time - don't let it happen again.

For exact parts replacement you might find some honeywell numbers that may actually make a hit on Google. Even the most bizzare combo of Alpha and numeric gibberish in quotes will sometimes yeild pure Google gold. Other than dealing with a honeywell employee, I have no other suggestions on hunting down your part.

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Need wiring for honeywell pro 3000 in trane xe1200


the pro 300 is a single stage thermostat and can not be wired to control 2 heat stages seperately

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