20 Most Recent Honeywell Programmable Thermostat Heater Questions & Answers

Question edited for clarity 'make model (what it is)'. Question moved from Sewing Machines. Seems and older model, the ML2 may suffice. https://www.google.com/search?q=newlec+nl1chdpt1+installation+manual ..

I had this same problem today.  I called Honeywell and they said the flashing broken battery symbol may mean low batteries, or it may mean the battery type is incorrect.  They recommend only non-rechargeable alkaline batteries.  I was using rechargeable NiMH batteries.  Even though they were fully charged, I had the flashing battery symbol and the thermostat relay would not work.  I replaced with alkaline, the flashing battery indicator went out, the thermostat works again.
Odd that it worked for 3 months on the rechargeables after first install. I did notice the broken battery symbol came on after the first few days, but I checked the battery charges and they were good, so I disregarded the symbol until the thermostat stopped working today.  Apparently there is something about the NiMH performance characteristic that the thermostat doesn't like.

The problem is that the 2 units are "not speaking to each other". this could be caused by low batteries or a loss in signal caused by a powercut or an objection in the way of the 2 units.

first you need to turn the power off to the r666od (or otherwise known as the HC60NG) for 10 secs, then turn back on. then hold the grey button in for 15 secs. release then hold in for a further 5 secs.

go to the honeywell cm61 press the off button. hold temp up. temp down and prog 1 in for 3 secs until the dipslay goes to INST. at this point release all 3 buttons then press the i button until a beacon starts flashing.

this is now the end to your problem.

N.B the reason the green light was on is because the man override button will have been pressed.

hope this helps

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Question moved from Cellphones. Installation and Operation Manuals in the link. https://www.google.com/search?q=honeywell+t6+thermostat+manual Page 19, you need a PIN number https://digitalassets.resideo.com/damroot/Original/10003/33-00410EFS.pdf?rv=3dcd3b3ec88147a5b92a322f6da2a211 ....

On the Pro4000 model you hold the 2 arrows until you go into setup mode. Then arrow up ONLY til you get to option 13. The display will read 13 and 1, press the DOWN arrow and it will read 13 and 0. This turns off Adaptive Intelligent recovery. Now hold the 2 arrows til you see the normal display screen. You are done.

I just did this with a Honeywell tech rep on the phone.

it gets its power from the unit via the data cable. go on the seely international website or the braemar website and they can put you in contact with another dealer in your area. get it fixed while still in warrenty.

Question edited to add 'make model (what it is)', which is needed for all questions of this type. Question moved from Cars and Trucks category to Honeywell Thermostat. http://aw.absolutaire.com/docs/component_docs/indexed/161.pdf It shows is as a very obscure Australian model (we are in North America). Listed as T822 Series Mechanical Thermostats Here is the manual https://www.houseneeds.com/upload/pdf/honeywell-t822install.pdf It describes it on Page 3 as; The T822 Thermostat controls 2-wire, 15 Vac to 30 Vac, gas, oil or electric heating-only systems. Installation and wiring are here https://www.engineeredair.com/parts/9dt2xkJ39.pdf A tortuous and long winded route that took 20 minutes to get there :>D ..

Operating Manual 2011: https://www.manualslib.com/manual/794763/Honeywell-Utilitypro-Series.html?page=26#manual https://www.manualslib.com/manual/794763/Honeywell-Utilitypro-Series.html?page=32&term=05-11&selected=1#manual Operating Manual 2007: https://www.manualslib.com/manual/555421/Honeywell-Utilitypro-Series.html?page=26#manual https://www.manualslib.com/manual/555421/Honeywell-Utilitypro-Series.html?page=30&term=12-07&selected=1#manual

To start you have to push and hold the up and down buttons simultaneously until the screen displays "setup" across the top. There will be a number on the left, and a number in the right. Press the UP arrow until the number on the left reads 14, The number on the right should read 0. Press the DOWN arrow to change it to 1. Once this has been done you can press the RUN button to save the changes, and exit the setup screen. Your display will now read Celsius,

To turn the fan off, press the "fan key" until it says "auto". This will turn the fan off. When the programs scheduled, changes, the fan will go on again. You have to repeat the fan to "auto" each time the schedule changes.

your thermostat may not be made for electric heat, if not then your wiring is overloading the thermostat causing the wires to heat up.

Honeywell RTH6350 Model.

Request the user guide directly from Honeywell.

I had blank screen also. I placed my screwdriver between the battery terminal and battery tab and voila the screen turned on. I removed the batteries, pulled the tab out, replaced the batteries, and the thermostat is working like a champ again.

Can be Low Battery Warning or Air Filter Reminder.

Press Done on the thermostat if you aren't at the home screen. Then press Set Clock/Day Schedule at the bottom left of the touch screen. Then use the up/down arrows on the right to set the time. Press Set Day (second from the right on the bottom of the touch screen) then use the up/down arrows to set the Day of the week. Press Done to exit the set clock menu. (Alternatively, press Set Schedule to continue to set your thermostat to your daily schedule.) Honeywell has the manual available on their site: http://yourhome.honeywell.com/home/ . Enter the model number in the search box to find the available manuals. See page E36 (28 of the PDF). I hope this helps. Cindy Wells

Centigrade?

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

It sounds "locked". Refer to the installation/setup manual that came with the tstat for information on how to lock and unlock the thermostat.