TMG-340-39 Tire Pressure Gauge   What if the LCD display doesn't light up?  Time for new batteries!     What kind of batteries does the TMG-340-39 take and how many? 2 LR44 batteries.    How do I replace the batteries?  The rubber housing can be gently removed from the handle end of the gauge.  Underneath you will see a small door with an arrow on it.  Use a small screwdriver or a straightened paper clip to push the catch behind the arrow towards the arrow, and the door will open revealing the cleverly hidden batteries! Then simply replace the batteries and the rubber housing and you are good to go!

TempMinder® MRC105AG Wireless Weather System

I can't figure out how to change the time from 24 hour to 12 hour clock! To switch from 24hr clock, press & hold the "up" button for 2 seconds. We suggest you do this after noon as you will then see a tiny "PM" icon on the screen.      The Moon Phase should show that tomorrow is a full moon but I don't see anything. On the moon phase, your unit is actually showing the last quarter (dark side). It will switch to all white (full moon) at midnight tonight.

TempMinder® MRC68JM Weather Station Rain Gauge

I've installed the red batteries that it came with and nothing.  The red batteries included with your unit were factory test batteries.  Replace these (TRANSMITTER FIRST) with fresh alkaline batteries (or lithium for the outside transmitter in cold weather.)  The rain gauge will not work if frozen, so take the rain cup in for the winter.     My receiver is not showing the outside temp even though it is 20 feet away through the window. The windows, if double paned, are interfering with transmission.  Move the receiver to a few locations until you get a good signal.    Why can't I get the remote humidity to work on my MRC68JM?  Everything else is fine.  The MRC68JM transmits outside temperature but does not record outside humidity.

Here are some  "quick fixes" and tips  for all TempMinder®  Thermometers, Weather Stations, transmitters & receivers.

Always use fresh, alkaline batteries.  DO NOT use non-alkaline, rechargeables and "Dollar Store" batteries. Lithium batteries allow superior transmission in cold temperatures.  Use them for your outdoor transmitters.  Double-paned glass can cause interference- sometimes a cement wall works much better. 99% of TempMinder "problems" are solved by moving the receiver and/or transmitter to a few different locations until you get a strong signal. Other wireless gadgets can cause interference.  Keep in mind doorbells, garage doors, microwave ovens and wireless routers. Take your rain cup inside for the winter (unless you need an extra large ice cube maker!) Outdoor transmitters should be placed under an eave or sill, out of direct sunlight and drenching rain for best performance. Remove any protective stickers from the transmitter and receiver displays.  Yes, people have really called us asking why the numbers are all "messed up" and hard to read! Our TempMinders® are not meant to replace NOAA or Environment Canada's Weather Office.  A variance of up to 3-4 degrees Fahrenheit or 1-2 degrees Celcius is normal. Remember, the temperature on the weather channel may be several degrees different than the temperature at your house.  Always try fresh batteries and using the "reset" if the temp and/or humidity are blinking.  Use a straightened paper clip at the reset, and wait to hear a tiny click. If nothing suggested here helps, shoot us an e-mail with your TempMinder® model number and a brief description of the problem so we can lend a hand!

TireMinder® TMG300C, TMG400C & TMG500HD

CLICK HERE for TPMS TROUBLESHOOTERS (what we learned AFTER we printed the original manuals!) Complete instruction manuals can be found on the Instruction Manuals page if yours have disappeared like most instruction manuals tend to do.