Question about Honeywell Power Humidifier: Furnace Humidifier/ Humidifier
My Honeywell Chronotherm III LCD panel was very faint and I could barely make out that it said rpl bat. I replaced the 3 old AAA alkiline batteries with new ones and reprogrammed the theromostat. After less than 15 minutes, the "rpl bat" started blinking again. The thermostat is working fine and keeping to the program temperatures that I have set but I'm concerned that it keeps blinking. Why is this happening and how can I fix it?
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Posted on Jan 02, 2017
I had that last night. I turned off the unit for a couple of hours and it came back on and ran and cooled. I have no friggin' idea if it will work but it got us through last night.
Posted on Jun 24, 2008
rh and rc should have a jumper between them.connect red to either.y=yellow g=green w=white and do not use the blue.your new stat will run on batteries.
Posted on Jul 04, 2008
when i have seen this in the past, i have been able to clean the contacts that the batteries touch.they may not look dirty, but if they get a little corrosion or get tarnished, they will not let the full battery power get to the stat and it will think the battery is low. try cleaning it with some emery cloth and see if that helps.
Posted on Jan 27, 2009
What you can do is try and clean the contacts. Open the door on the thermistat and remove the two screws, after that you can seperate the part that is mounted to the wall and the front panel. Look at the part that is mounted on the wall and you'll see the contacts that should be a copper color. They might be black from age. Clean them and you'll be surprised how well it will work after that.
Posted on Mar 15, 2009
It would appear to me that you have lost the 24 volt power supply to the thermostat. In referencing the manuals for this thermostat, available @ www.honeywell.com, I've found that when the thermostat is not connected to the wall plate (plate mounted on the wall, that the thermostat either snaps or screws into), it will display the -AC. This being said, either the thermostat is loose on the wall currently, or your 24 volt transformer has died. Hope this helps.
Posted on Dec 23, 2009
Testimonial: "Thank You. Your advice was right on the money. I was in the attic pulling out some winter gear and accidentally had turned off the switch next to the furnace which was the 24 volt power supply to the thermostat. "
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