Purchased to Auto Turn-on & off our porch & garage lights. Remove the old batteries and replace them with new ones. We are working on it. On my unit, the battery simply unclips from contacts that are soldered onto the PCB. This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. Megaera Lorenz is an Egyptologist and Writer with over 20 years of experience in public education. How to clear low battery from display after Honeywell Thermostat battery replacement? First, make sure you have two new AA or AAA batteries on hand, depending on the size your thermostat takes. Systems like this have limited capabilities and can not be programmed other than raising or lowing the temperature. Has been working as advertised without issues since install. Honeywell Programmable Light Switch Timers, Automatic Lights, and 7-day Paid a little bit more for Honeywell and I'm kicking myself for not buying this switch from the beginning. Operating Manual System setting Press the SYSTEM button to select, then press DONE. Can i just switch unit off and change batteries or do i need to turn power off please? See that white lump? Security is a top concern these days, making it a profitable industry too. Using this, you can program different settings for different weekdays and weekends. Ah, the Honeywell ST699 24-hour central heating/hot water timer. We have been using Honeywell light switch timers for years and find them to be the best: easy to program and great tech service, should you need it. Congratulations! If the system has a screen, a warning such as Low Batt indicates that you must replace the batteries soon. I think my model # is T8400B 1018 (2), or maybe 0330 2C. Honeywell LYNXRCHKIT-SC LYNX 4 hr battery - amazon.com Please lmk. Pull each one off the battery terminals. You can program up to 7 different events. You are now ready to install your new Honeywell alarm battery, which is usually a 12-volt, 4-Amp hour battery. I'm a licensed Home Inspector, Certified Professional Inspector (CPI), Certified Master Inspector (CMI), and FHA 203k Consultant. Non-programmable systems do not have control panels, and therefore do not require batteries. The thermostat was changed 5 yrs ago and I wasnt given the owners manual so I have no model number. Looking for a Honeywell thermostat manual? I keep trying to reset the panel but they keep beeping, rather loud. We will get back to you with answers! Close the door and lock it. 9832 https://www.smarthomeperfected.com/honeywell-thermostat-manuals/, https://www.smarthomeperfected.com/white-rodgers-emerson-thermostat-manuals/, https://www.honeywellhome.com/us/en/products/air/thermostats/wifi-thermostats/t6-pro-smart-thermostat-multi-stage-2-heat-2-cool-th6220wf2006-u/, Roomba Battery Replacement Guide (All Models), Honeywell Thermostat Flashing Cool On Troubleshooting Guide. To remove the battery holder sitting at the top-right corner, press and pull the cover plate. Thermostats such as the Honeywell T87N1000 Tradeline Thermostat do not require batteries. My thermostat went blank . I'm not sure if this is the official way to get the thing apart but I used a knife to prise down the tabs holding the facia onto the wall mounted backbox. If you have a blank screen, its typically a power issue. Scheduled programming allows this light switch timer to turn your home lights on and off automatically, helping you save both time and energy. Try to pull all power from the alarm by disconnecting the battery and the transformer. The N in the number kind of looks like a sideways 2, We have the user guide and installation manual for that model on our manuals page here https://www.smarthomeperfected.com/honeywell-thermostat-manuals/.