LuxPRO Thermostat Says Low Battery with New Batteries? (Solved)

LuxPRO thermostats are excellent devices that offer functionality and affordability. However, these devices occasionally experience niggling problems, such as displaying the LOW BATTERY symbol even if you just changed the batteries.

If your LuxPRO thermostat says low battery with new batteries, it’s likely that the device is malfunctioning or needs servicing. Read on for tips on troubleshooting common battery issues on LuxPRO thermostats.

Table of Contents

Troubleshooting LuxPRO Thermostat Low Battery Issues

1. Perform a Hardware Reset

So this is the first step to resolving the low battery warning message in a LuxPRO thermostat (even after installing new batteries).

Don’t worry, performing a hardware reset won’t erase your temperature settings and other data. It only reboots/refreshes the thermostat, which usually fixes minor issues, such as the low battery error message.

If you’re not sure how to perform a hardware reset on your LuxPRO thermostat, here is how to do that:

Remove the thermostat from its position on the wall.
Remove the battery cover and remove the batteries.
Wait for 15 minutes before replacing the batteries, then replace the cover.
Find the hardware reset button on the side of the thermostat (a circle button labeled “H.W. Reset”). Next, long press the button for a few seconds. This will reset the thermostat and possibly clear off the low battery warning message.

If that doesn’t help, continue to the next step.

2. Perform a Software Reset

The problem with your LuxPRO thermostat may be because of a glitch in the programming. If that’s the case, you’ll need to perform a software reset on the device to clear any errors in programming.

Unlike a hardware reset, note that a software reset erases all the programming on the thermostat and restores the device to its default settings. You cannot reverse a software reset, so exhaust other options before applying this fix. And you want to write down your temperature settings to enable you to reprogram the thermostat with ease.

If you’re ready to perform a software reset, here is how to do that:

If your thermostat is locked, disable the keypad lockout on the thermostat.
Switch the thermostat to the OFF position.
Press the SET and NEXT buttons simultaneously for 5-6 seconds.
Wait until the LCD screen is fully populated before releasing the buttons.

If this method doesn’t reset your thermostat, check the right/left side of the thermostat to see if there is a button labeled “R. Reset”. If you find the button, long-press it for about 5-6 seconds.

This should restore default settings on your thermostat and as well fix the low battery warning message.

But if the problem continues, see the next troubleshooting steps.

3. Check the Terminals

If you delayed changing your dead batteries, they might have leaked acid and corroded the battery terminals. This is common if your former batteries had poor seals or died long before being replaced.

If your device still shows the LO BAT message after installing new batteries, the terminals may be corroded. To solve this issue, you’ve to clean the acid leakage and ensure the batteries contact the terminals.

The easiest way to do that is to dip a Q-Tip into vinegar or lemon juice and rub the terminal surfaces slowly. This should remove the corrosion and ensure there’s enough current passing through the terminals.

4. Check the Battery Positioning

When your LuxPRO thermostat displays LO BAT messages, the batteries may be out of position. Open the battery compartment, then check and place the batteries properly.

Here’s how to do that:

Remove the batteries.
Check the markings on the batteries.
Place them in order of polarity (+/-).
Turn on the thermostat and check if the low battery message has disappeared.

5. Install New Batteries

If you’ve just installed new batteries on your thermostat and it still shows the LO BAT message, it could be that you installed substandard batteries.

Your LuxPRO thermostat needs the correct battery to function without issues. And if you have the wrong batteries installed, it may drain quickly and lead to those pesky LO BAT messages.

The ideal batteries for most battery-powered LuxPRO thermostats are AA non-rechargeable alkaline batteries, so ensure you get the correct batteries. Consider buying Energizer and Duracell batteries, as they seem to work best with the LuxPRO thermostats.

And if you’re not sure how to correctly replace the batteries on your LuxPRO thermostat, here’s a handy guide on how to do that:

Unhook the thermostat from the wall.
Remove batteries from the tray.
Replace with fresh AA alkaline batteries, observing polarity markings (+/-).
Reset the day and time.
Mount the device on the wall base plate and snap the bottom into position.

Frequently Asked Questions

How do I reset my LuxPRO thermostat after changing the battery?

To reset your LuxPRO thermostat after changing the batteries, find the hardware reset button (labeled “H.W. Reset”) on the side of the thermostat, then long-press it for about five seconds.

How do I know if my thermostat needs a new battery?

Programmable thermostats have a low-battery indicator that flashes 1-2 months before the battery runs out of power. Immediately you discover a flashing low battery light, replace the batteries. Also, ensure to use the recommended battery for the thermostat to forestall potential issues.

What happens if the thermostat battery is low?

Thermostats with low batteries cannot operate properly and may stop working. It’s common for the screen to go blank when the battery finally dies. Besides, your home’s cooling and heating units won’t function since the HVAC unit cannot receive commands from a dead thermostat.

When should I replace my thermostat battery?

The ideal interval for replacing thermostat batteries is 8-12 months. Changing the batteries in your thermostat prevents problems and reduces maintenance hassles.

If your batteries wear out earlier, replace them as soon as you notice. Leaving dead batteries in the device might encourage acid leaks and damage the thermostat components.

Final Thoughts

Getting LO BAT messages after replacing fresh batteries can frustrate even the most Zen users. Fortunately, this article has armed you with enough information to tackle this problem next time it pops up.

If none of these fixes work, it may be time to ring up your technician for help. You can also reach out to the LuxPRO technical team for support.