Why do TPMS systems fail?

holstein13 wrote:
I had the TST tire sensors for three years on my old coach and struggled with them on almost every trip until I finally had enough and just gave them away. My coach was only 31 feet long, yet virtually every sensor would stop working occasionally. Sometimes it would spontaneously come back and other times I'd switch out the batteries and re-program the thing (which wasn't fun). A couple of times I had to return them to the manufacturer who sent me new ones.

Originally, I had to unscrew them to add air to the tires until I switched to the pass-through model. But the pass-through model was too close to the rim on the front tires so I ended up having to unscrew those as well to fill.

My main concern was the "lost signal" alarms I'd get while driving somewhere. I found it overly stressful to worry about something that might be going wrong even though I was fairly certain that it was fine.

After I gave them all away, I simply checked my pressures manually on a regular basis and had much more stress free trips.

Now, I've got the "in the tire" models built in that came factory installed and integrated with the trip-tek system and, would you believe it, I'm still having problems with the lost signals. They are replacing the antennas and junctions in a couple of weeks and hopefully that will fix the problem for good.

Your TST system was not working most of the time. When the receiver losses contact with a transmitter the signal has to be lost continuously for about 1 hour before an alarm is generated. So you probably was never getting reliable data.

Recommend you do an inventory of what is in the coach. I suspect there is something that operates on the same frequency as the TPMS system. IF I remember correct the TPMS operates in the 400 meg band the same as many remote temperature devices.