a/c doesnt work after battery change, it blows hot air, fuses are visually intact, a/c button doesnt light up, any suggestions would be greatly appreciated 2004 chevy silverado 2500hd : Discretesignals Ultimate Carjunky / Moderator Aug 27, 2012, 5:02 PM Post #2 of 9 (9891 views) Re: a/c doesn't work after i changed my battery Sign In Manual or automatic climate control? I. It will shut of the lo batt warning then put the batteries correctly. Why is it that when we say a balloon pops, we say "exploded" not "imploded"? It only takes a minute to sign up. There are some sure signs that your thermostat isn’t working correctly. Not only do the batteries power the LED display screen, but they also power the relay that sends a voltage signal to the circuit board for temperature adjustment services. What you need to do is read the instructions that came with your thermostat. Besides the door which not fully shut, you also need to check the batteries. We can hear the click indicating it's trying but nothing is happening. site design / logo © 2020 Stack Exchange Inc; user contributions licensed under cc by-sa. To learn more, see our tips on writing great answers. Is this house-rule that has each monster/NPC roll initiative separately (even when there are multiple creatures of the same kind) game-breaking? Low Display Brightness Some thermostats require battery change only once a year. I have attempted a factory reset on the thermostat, and I do hear a quiet but definitive "click" when I believe it is attempting to activate the HVAC unit, but that's as far as it gets. I replaced the batteries on it because the battery indicator light was on and it wasn't working, but after replacing the batteries the thermostat is still not … read more. It's one of those that activates when the cover is on and deactivates when the cover is off. Thermostats can be simple dial- or switch-controlled thermostats, or they can be programmable digital thermostats. As with all electronic or mechanical equipment, the thermostat will work worse the older it gets. You can certainly call an HVAC company to fix this, but that costs way more than a few AAAs. The first being to power the display so that you see the current settings on the stat and to just them accordingly. You can check this using a multimeter, by testing the voltage between the red R wire and the blue C wire. Put the system back into "cool" mode and try … I have attempted a factory reset on the thermostat, and I do hear a quiet but definitive "click" when I believe it is attempting to activate the HVAC unit, but that's as far as it gets. Refer to your manual to see if you need to reset the float switch. Changing the thermostat’s battery is a relatively simple process, but it’s a good idea to have the thermostat’s user manual on hand for quick reference. However, it worked with the old batteries, one of which was Energizer, and the other was Duracell. On the front of the thermostat is a reset button. Thermostats can be hard-wired or battery-operated, but even battery-powered models should work for several months to a year or more without new batteries. Will a thermostat work if batteries are dead? I went out and bought brand new AA batteries (good name brand) and no luck. 2008 Pontiac Torrent-Maintenance & Repair. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Check the fuse or circuit breaker and replace or reset if necessary, if display is blank or says REPL BAT, install fresh batteries. Follow the steps below to change the battery: Remove the mounting from the wall or remove the front cover depending on the Emerson thermostat model you have. Does have power with batteries, still no cooling, Did I fry my Furnace Control Board? 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