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.

strange - were you running a repeater ?

I've got the TST 507 system with the user serviceable battery sensors in our coach. I can get about 15-18 months out of a set of batteries (using the repeater helps when the batteries get weak).

Ive never had to REPROGRAM my TST sensors after i replace the batteries.

Given the fact that your having failures with a 2nd I'd have to say that you've got some environmental / interference issue.

For me nothing could be less stressful than having the TST system....the only time i have to add air to any tires is when the weather changes.....its a pain in the butt to drag hose out and start a compressor or the coach (if I'm at a RV park) & the valve stem on my inner duels are tough to get to....if it weren't for the temperature change in the winter id probably never have to add air to a tire.

I have a small 10lb Co2 bottle & 175psi regulator on the bottle that i can throw in one of my storage bays to take withe me for adding air to tires or running an air tool (to avoid hauling a 120vac compressor or running our coach at camp).