Community Forums

Sbrownstein · 11-03-2018, 10:43 AM

Purchased a TST507RV system about two years ago. Love it, but recently I have encountered some issues. First one is a sensor that apparently will not reliably depress the Schrader valve and hence does not work. Second problem is a slow leak in a tire. Actually hoped for sensor leak and a little soapy water confirmed that the leak is, in fact, in the sensor itself. Have contacted TST and am hoping that they stand by their product as I read before I bought the unit. Anybody else have these issues? I will post back when I hear from them.

LJowdy · 11-03-2018, 10:52 AM

I've had their system for 5 years with no problems. (8) pass through sensors on the coach, (4) sensors for my enclosed trailer and (4) sensors for my GMC Terrain. In fact I actually have (2) monitors. One is set up for when I haul my trailer and the other is set up when I haul my car. That way I don't have to re-program tire pressure parameters when hauling one or the other. The only thing I've done is change batteries in the sensors not because they were not transmitting but just preventative maintenance.

Carlos Marti · 11-03-2018, 10:52 AM

I had a problem with the cap not pressing the valve core on one of my tires when I first bought the system. I adjusted the core with a valve core tool and all my sensors have worked fine since then. It has been 6 or 7 year since I did it. I think I just unscrewed the core about 1/4 turn.

Sky_Boss · 11-03-2018, 11:02 AM

Quote:

Originally Posted by LJowdy

I've had their system for 5 years with no problems. (8) pass through sensors on the coach, (4) sensors for my enclosed trailer and (4) sensors for my GMC Terrain. In fact I actually have (2) monitors. One is set up for when I haul my trailer and the other is set up when I haul my car. That way I don't have to re-program tire pressure parameters when hauling one or the other. ...

For those getting the new color monitor, it now has the ability to create up to 4 different trailer/toad configurations. I've had the TST 507 system for over 5 years and I think the color monitor is significantly easier to read. My only beef is that they swapped the positions of PSI and temp. I'm getting use to it but 4 years of scan practice are hard to change. LOL

BTW...I have come to really dislike the flow through sensors but to each their own.

Sky_Boss · 11-03-2018, 11:04 AM

Quote:

Originally Posted by Carlos Marti

I had a problem with the cap not pressing the valve core on one of my tires when I first bought the system. I adjusted the core with a valve core tool and all my sensors have worked fine since then. It has been 6 or 7 year since I did it. I think I just unscrewed the core about 1/4 turn.

Exactly!

I will also toss this out. It is possible to over-tighten the non-pass through sensor cap. When this happens the cap compresses the sensor antenna and you will lose signal.

**Lt Dan** · 11-03-2018, 02:29 PM

Are the sensors you are having a problem depressing the valve on stem extenders? If so, that's a known problem and you may have to go with solid valve stems or better grade extenders. As far as leakage, you do know there is a small o-ring all the way around the inside of the cap? After a while the o-ring ages out and has to be replaced. They should have sent you extras in the kit and you have to really stretch it over the body to get it to fit.

Sbrownstein · 11-03-2018, 06:25 PM

Don't think it's the gasket as it appears to be internal. Unfortunately I have never seen a diagram of the sensor. It appears to be an internal leak.

**Lt Dan** · 11-03-2018, 10:57 PM

Quote:

Originally Posted by Sbrownstein

Don't think it's the gasket as it appears to be internal. Unfortunately I have never seen a diagram of the sensor. It appears to be an internal leak.

That's exactly where the o-ring will be. If you screw the cap off, there is a thin o-ring between the cap and the sensor body. I just replaced two of mine.

PanJH · 11-06-2018, 07:54 AM

There is also an O-ring inside the sensor where it screws onto the valve stem.

Sky_Boss · 11-06-2018, 10:43 AM

Quote:

Originally Posted by Lt Dan

That's exactly where the o-ring will be. If you screw the cap off, there is a thin o-ring between the cap and the sensor body. I just replaced two of mine.

IMO, that seal is only a weather seal. I could be wrong but it seems too flimsy in itself to stop a pressure leak. Besides, I wouldn't think the sensor should leak any air into the cap.

Sbrownstein · 11-06-2018, 10:52 AM

Agree. No way that flimsy "O ring" that isn't even in a groove would hold any pressure. It is a weather seal. The sensor is potted below the battery and I guess mine has a leak.

veraken · 11-07-2018, 05:33 AM

Call TST at (770) 889-9102. I had a problem, and they were very responsive. Promptly sent me replacements at no charge.

Sbrownstein · 11-07-2018, 05:46 AM

Quote:

Originally Posted by veraken

Call TST at (770) 889-9102. I had a problem, and they were very responsive. Promptly sent me replacements at no charge.

I did call and they have taken all my sensors back for analysis and will replace if necessary. Very responsive.

JCM · 11-08-2018, 02:25 PM

Quote:

Originally Posted by Sky_Boss

For those getting the new color monitor, it now has the ability to create up to 4 different trailer/toad configurations. I've had the TST 507 system for over 5 years and I think the color monitor is significantly easier to read. My only beef is that they swapped the positions of PSI and temp. I'm getting use to it but 4 years of scan practice are hard to change. LOL

BTW...I have come to really dislike the flow through sensors but to each their own.

For what it is worth I agree with being annoyed with them swapping the positions of the PSI and temp readings . feel that I have to look 2x as long as I did before as I have to change my focus. I may go back to my B&W monitor next year.