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Old 10-15-2012, 01:51 PM   #29
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Late last year the sensors seemed to stop working on one or two wheels out of four. I reprogrammed the unit this past spring since that helped before.

This year the Doran is giving me more and more problems. I change the tightness and sometimes that works. I will look at the seals on the sensors as recommended above, but I suspect the batteries are ending their life, or the seals are going bad. Like others, I tightened the sensors down for several years and may have caused the problem. I don't believe the paperwork that came with it says anything about how tight to make the sensors.

Since the sensors work intermittently, it is pretty hard to figure it out. Sometimes, as the tires warm up, the sensors start working. I can't see how a few psi would make a difference, but I don't know. The batteries are going on 4 years old. I think Doran claims they have a 5 year life. I always remove them when we are traveling as that should extend the battery life.

Maybe I'll just get another system with replaceable batteries, though Doran claims a sealed unit is better. I can understand it might be, but they sell a sealed unit, so I expect they'd say that.

Four new sensors are $200. Maybe a different system with replaceable batteries would be worth it since I'd never have to order replacement sensors again.

How are the other brands working?

Gene
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Old 10-15-2012, 02:06 PM   #30
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Gene, If you're going to spend $$$ anyway ( a new system or new sennsors) do you wanna be the guinnea pig and cut the top off a sensor, submit pics, and see what kind of battery is in them. When the time comes, I'm gonna try and replace the batteries in my Doran and reseal. I've done Ipods and other stuff with "non-replaceable batteries" with great success.

OR, if you're gonna replace...maybe send me one of the old ones for dissection?
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Old 10-15-2012, 04:30 PM   #31
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I just ordered a Tire Minder through Camping World—it is on sale right now and beats the Amazon price. Since we are leaving in about 10 days, I couldn't trust ground shipping, so FedEx will apparently land a plane in my yard by Thursday for an extra $22. Ground is free with a Good Sam card, but no break on the express shipping.

We are both tired with all the alarms from the Doran because of the well sealed but not so great sensors. Doran does not list a price for the replacements on its website, so rather than wasting time trying to find it out, I assume it is still $50 each. So for about $75 more I get a new system, one that will mount at the corner of the windshield where I can reach it easily and I can replace batteries. I don't think the Tire Minder has a wire to a 12 v. receptacle, but has rechargeable batteries which may be a pain, but we'll get used to it.

The slow leak I thought I had in one tire probably was caused by me having the sensor too loose. I didn't hear air escaping, but enough air must have been leaking to cause a problem. I filled the tire after I discovered it was low and it didn't lose anymore for the next 300+ miles. Yesterday we used soapy water on the tire, bead and valve stem and couldn't find a leak or a nail or a screw in the tire. We are tired of screwing around with the Doran. It worked well for 3 years, but that isn't good enough.

I expect the Doran sensor has a watch type battery. So, dzn', when I get the TM working, I can "crush" the Doran sensor and see what is in it. The sensor doesn't look like taking it apart will be easy and re-sealing may be fruitless, but I will get some pleasure out of destroying it, carefully, of course.

Gene
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Old 10-15-2012, 04:54 PM   #32
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Gene, I guess you'll have 4 to play with. I was thinking a hacksaw blade around the groove at the top and remove the "cap" with the writing on it would be my first choice.
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Old 10-15-2012, 06:40 PM   #33
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...............................

I don't think the Tire Minder has a wire to a 12 v. receptacle, but has rechargeable batteries which may be a pain, but we'll get used to it.


..........................

Gene
Gene,
I have the Hawkshead HD which appears to be identical to the Tire Minder. According to Tire Minder, the only difference is the software in the control unit. I'm guessing the difference is the logo that pops up at turn on. Hawkshead will not confirm any knowledge of the existence of Tire Minder. Assuming they use the same hardware, the control unit comes with a 12 v DC charger. My experience is that it will run for weeks with a full charge of the control unit. The sensor batteries last longer than 15 months for me. I gave up waiting and just changed them.

Ken
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Old 10-15-2012, 07:13 PM   #34
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Ken,

Glad to hear the charge lasts more than a few days. Can you leave it on the windshield and take out the battery to charge it? I guess I'll know in a few days, but I'd like to sleep tonight. Otherwise I'll be up all night wondering.

I wonder if a Hawkshead detects a Tire Minder, it tries to hack into it?

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Old 10-15-2012, 07:17 PM   #35
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Dear Lord, Gene....I thought I was the only one who was sleep deprived over such trivial crap!
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Old 10-15-2012, 08:14 PM   #36
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Ken,

Glad to hear the charge lasts more than a few days. Can you leave it on the windshield and take out the battery to charge it? I guess I'll know in a few days, but I'd like to sleep tonight. Otherwise I'll be up all night wondering.

I wonder if a Hawkshead detects a Tire Minder, it tries to hack into it?

Gene
The control unit sits in the mount held there by friction. You can lift it loose and leave the mount in place. The charger plugs into a 12v auto type socket. It is not to long, but the control unit could be charged in place while in use, if you had a 12 extension cord.

Ken
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Old 10-16-2012, 12:36 PM   #37
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UPDATE from the Silver Otter: So, got a new, bigger, truck and had to re-position the console unit down and away. Signal strength fell to nothing, no readings. Went to Doran and bought the extension antenna ($99?) and rigged it on a home made bracket just inside the rear window of the new truck. BINGO. All systems go, and have remained so for many, many miles. No more false alarms.

That said, ours are only about two years old at this point, so the issue about battery life, etc. is still to be faced. Like Gene and dzn I'll probably take tools to them if/when they seem to be failing to see what's in there.
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Old 10-16-2012, 03:55 PM   #38
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UPDATE from the Silver Otter: So, got a new, bigger, truck and had to re-position the console unit down and away. Signal strength fell to nothing, no readings. Went to Doran and bought the extension antenna ($99?) and rigged it on a home made bracket just inside the rear window of the new truck. BINGO. All systems go, and have remained so for many, many miles. No more false alarms.

That said, ours are only about two years old at this point, so the issue about battery life, etc. is still to be faced. Like Gene and dzn I'll probably take tools to them if/when they seem to be failing to see what's in there.
Ya always gotta see what's in there, don't 'cha. Been a problem of mine since childhood. I also have had zero problems with my Doran....but like you, it's been two full towing seasons only.
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Old 10-16-2012, 06:06 PM   #39
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Ya always gotta see what's in there, don't 'cha. Been a problem of mine since childhood.
Me too, but getting then back together is the problem.

Gene
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Old 10-16-2012, 06:13 PM   #40
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Me too, but getting then back together is the problem.

Gene
Oh, Gene...that is soooo funny to me. I used to grab things I was curious about, as a child, disassemble them and hide them.....like Mom and Dad wouldn't notice. They always did.

It wasn't until I was 19 that they figured out that my path wasn't books (except service manuals, National Geographic and encyclopedias), or teaching, or anything not to do with my hands or how stuff works. They eventually figured it out (after I did) and all is good now. I got in so much trouble though.
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Old 10-16-2012, 06:25 PM   #41
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Have either of you ever seen this?

Dilbert, the "Knack" - YouTube

Ken
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Old 10-16-2012, 06:32 PM   #42
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Have either of you ever seen this?

Dilbert, the "Knack" - YouTube

Ken
Sad, but true.....except the engineering books, and calculus bored me (or didn't make sense). It's hard to concentrated when...."squirrel!!!!".....CRAP, there I go again!
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