Frequently Asked Questions

Frequently Asked Questions (FAQ)

Does the system need to be reprogrammed every time I change batteries?

No, you do not need to reprogram the TireMinder system every time you change batteries. Just remember to put the transmitter back on the same tire position they were taken off of.

For simple to follow instructions on how to replace the batteries, please follow this guide:

  • Make sure your TireMinder monitor is on.
  • Remove a single transmitter from the valve stem. Once removed, the TireMinder transmitter should display 0 PSI.
  • Once the transmitter is removed from the valve stem, remove the cap and then the CR1632 battery from underneath the battery bracket.
  • Insert a new battery into the transmitter’s battery bracket.
  • Screw the transmitter back onto the same valve stem it came off of.
  • Once the transmitter is back on the valve stem, the TireMinder monitor will display the updated tire pressure, confirming the procedure.

What is the difference between the TMG400C, TM66 and the A1A?

The main differences between the TireMinder TM66 and the A1A are the A1A has a 40% larger screen (slightly more than an inch larger), a dedicated ON/OFF button and mode indicators. Also, the TM66 is exclusive to Camping World.

Besides those differences the TM66 and A1A have nearly identical software.

As for our TMG400C, it has been retired since the beginning of 2015.

For a detailed comparison chart, please click here: TireMinder A1A, TM66 and TMG400C Comparison Chart

Aluminum Valve Stems & Galvanic Corrosion

Image of TireMinder Brass and Aluminum Transmitters

All towed vehicles will have either rubber (brass) or metal (aluminum) valve stems. If you have a rubber valve stem, you will need brass transmitters. If you have a metal valve stem, you will need aluminum transmitters.

RVs, MotorHomes, 5TH Wheels and Trailers will all have either rubber (brass) or metal (steel, chrome, or nickel) valve stems, all of which work with the TireMinder brass transmitters.

All TireMinder kits come with brass transmitters. If you need aluminum transmitter for your towed vehicle, they can be purchased separately.

How to get back to PSI from kPa, BAR or kgf/cm2 (stuck in kPa, BAR or kgf/cm2)

  1. Make sure you are in Monitoring Mode. Monitoring Mode is the mode where you can switch between temperature and pressure using the right and left button.
  2. Press and hold the center button for 5 seconds until you hear a beep.
  3. Once you hear the beep, you will be in Baseline Pressure Setting Mode.
  4. Press and release the center button until you see the unit of pressure flashing.
  5. Once the unit of pressure is flashing, use the right or left button to cycle between PSI, Bar, kPa and kgf/cm².
  6. When you have chosen which unit of pressure you would like to use, press and hold the center button for 5 seconds to save you settings.
  7. After 5 seconds you will hear a beep and be back into Monitoring Mode.

Note: To get to unit of pressure in Baseline Pressure Setting Mode, you will need to press and release (click) the center button the same amount of times as the amount of transmitters learned to your vehicle. Therefore, if you have 6 transmitters learned to your monitor, press and release the center button 6 times and the unit of pressure will be blinking. When the unit of pressure is blinking (PSI, Bar, kPa or kgf/cm⊃) you can use the right or left button to cycle through to a different unit of pressure.

Do I need a Signal Booster?

Yes, the booster is mandatory! The booster should be installed with every setup.

The booster was initially created for distance, but as the world has become more "wireless" since the introduction of the TireMinder system in 2008, signal interference has grown exponentially. We have included a signal booster in every kit since mid-2013, unless otherwise indicated, because of this fact. The booster needs to be installed to combat signal interference and make sure that you are getting the best signal possible.

Transmitter Not Learning

Use the following steps to resolve the issue with your transmitter. If a step does not rectify your issue, move on to the next step.

Step 1: Replace the Battery

If a transmitter is not learning, first replace the CR1632 battery. To replace the battery:

  1. Remove the transmitter from the valve stem
  2. Unscrew the top cap
  3. Replace the CR1632 battery with a new battery
  4. Screw the top cap back on the transmitter
  5. Confirm you are back on the tire position you would like to learn and that the monitor or smartphone is ready to learn (e.g. a transmitter is not already added to the tire position).
  6. Screw the transmitter onto the valve stem.

Step 2: Confirm Air is Flowing Through Your Valve Stem or Extender

If you are screwing the transmitter onto the valve stem and do not hear a puff of air, it is possible that your valve stem or valve extender is not releasing air into the transmitter. To confirm that the issue is from the transmitter not receiving enough air through the valve stem or extender, we will try and learn the transmitter onto a known-working tire position. To do this, please perform the following:

  1. Remove the transmitter from the valve stem. The tire position that this transmitter came from will be referred to as tire position 1.
  2. Remove a confirmed working transmitter from a valve stem and place it to the side. The tire position that this transmitter came from will be referred to as position 2.
  3. On your monitor or smartphone, go to the tire position 1 and confirm that it is ready to learn a transmitter (e.g. a transmitter is not already added to the tire position).
  4. Screw the transmitter from step 1 onto tire position 2.
  5. If you receive a tire reading on your monitor or smartphone, you have an issue with your valve stem or valve extender.

In If you can learn a transmitter onto a different tire position, we recommend using a valve core tool to tighten the valve core of your valve stem or valve extender. Once tightened, try relearning the transmitter.

Step 3: Improve the Contact on the Battery Bracket

If the battery is not making proper contact with the transmitter’s battery bracket, the transmitter will not function correctly. To resolve this, make sure the eyelids on the battery bracket are touching the CR1632 battery. To do this, please perform the following:

  1. Remove the transmitter from the valve stem.
  2. Unscrew the top cap.
  3. Remove the battery from underneath the battery bracket.
  4. Use a pen or similar small device to push the two eyelids on the top of the battery bracket down so that the eyelids are making contact with the CR1632 battery.
  5. Place the battery back underneath the battery bracket.
  6. Screw the top cap back on the transmitter.
  7. Confirm you are back on the tire position you would like to learn and that the monitor or smartphone is ready to learn (e.g. a transmitter is not already added to the tire position).
  8. Screw the transmitter onto the valve stem.

Step 4: Contact Minder

If you are still unable to get the transmitter working, please give us a call! We can be reached Monday through Friday, 9AM to 5PM Eastern by phone, email or chat. To contact us, please click here.

What does NO5 or Signal Loss Mean?

If this appears on the display, it means the monitor has lost the “S”ignal from one or more transmitters. This issue needs to be addressed when convenient (before leaving on a trip, at the next rest stop or campground, etc.).

There are multiple possible causes for this warning:

  • The booster is not functioning. All TireMinder systems come with a booster included, unless otherwise indicated. If you have not installed it, then “shame on you.” If it is installed, check that the booster is powered correctly.
  • The antenna was not fully extended causing weak reception. (This does not apply to the Smart TPMS or TM-77)
  • The system is over 9 months old and the transmitter batteries need to be replaced. One of the transmitters has been lost or damaged.
  • Electronic Interference: With the constant addition of new wireless products (many running at 433 MHz), it is possible that the TireMinder® signal is being interrupted by electronic interference. If the signal comes back or is lost intermittently, you can rest assured the loss is due to such interference. 90% of this problem is cured by using the booster. Is yours installed with a green LED glowing? If YES, and all other possible signal loss reasons have been eliminated, consider moving the booster to a more central location.
  • Distance: Under normal operating conditions, distance is not an issue if you have installed the booster. At the same time, extreme cold and low transmitter battery (under 3 volts) power will shorten the operating distance even with a booster installed.
  • Missing Vehicle – “no5 (S)”: The appearance of the “no5 (S)” is inevitable when a towed vehicle/trailer is separated from the towing unit unless you implement the unique “Disconnect Mode”

If you do not use the “Disconnect Mode” but are aware you left the vehicle behind, you may simply ignore the warnings.

If you are not aware of the missing vehicle, we suggest you turn around and go find it!!!

When the two systems are re-united, the monitor will pick up the missing tires automatically. This usually happens within the first 20 minutes. If you need them to re-connect immediately, simply loosen (depressurize) and tighten (re-pressurize) the transmitters on any missing wheels.

OUR Recommended Alternative is to put the unit in the full “Auto-search Mode”

Why are the pressure readings from my TireMinder TPMS different than my tire gauge?

No (reasonably priced) pressure gauge is going to be 100% accurate. Likewise, NO TPMS is going to be 100% accurate. What’s important is that they are reasonably close and relatively consistent. You engineers and pilots probably have steam coming out of your ears after that last sentence!!

Maybe this will help.….

  • The TireMinder® transmitters are accurate to ± 3%.
  • TireMinder® brand pressure gauges (mechanical or digital) are among the most accurate on the market at ± two psi.

So, if you are running 100 psi in your tires, you could have a gauge reading 2 psi high and a TPMS transmitter reading 3 psi low leaving a difference of 5 psi. This is not uncommon and is considered totally acceptable. We have had calls from customers doing their initial installation saying all 8 or 10 TireMinder® transmitters are reading 9 to 11 pounds low!!! Can you guess what the problem is?? What is important to understand is that the TireMinder® TMPMS (and any other brand for that matter) is designed to warn you of changes. For example, it really does not care whether it starts at 97 psi or 108 psi. It is the changes and deviations from the baselines you need to know about.

So, please look at “the big picture”. You may use your trusty pressure gauge as the “standard” or you can use the TPMS as the standard. The important point is that they are all relatively consistent.

Can rubber valve stems be used with the TireMinder Transmitters?

Yes, TireMinder Transmitters may be used on rubber valve stems. However, we highly recommend brass or stainless steel valve stems.

Rubber valve stems can be an issue based on age, length and physical location (i.e. exposure to road salt, high heat, sun, etc). If using rubber valve stems, it is recommended that you check the condition of you rubber valve stems on a regular basis.

How to add or remove a transmitter

To add a transmitter, please click here.

To remove a transmitter, please click here.

To replace a transmitter, please click here.

What tire pressure should I set my RV tires to?

On your RV, there should be a permanently mounted placard (somewhere in the rig). It will have the various tire pressures recommended by the manufacturer to be used when the rig is new and empty.

By the time you add your groceries, water, liquid refreshments, etc. etc., you have probably added several thousands of pounds (and it may not all be balanced).

The best way to know exactly what pressures to run is by having your vehicle professionally weighed. Once you know the weight of your RV, you can use your tire manufacturer’s load and inflation table chart (found on our website or through RVSEF).

For a great article on tire inflation, please click here.

Are the transmitter/sensor batteries consumer replaceable?

Yes, our transmitters have user replaceable batteries.

For detailed instructions on how to replace the batteries, please click here.

Does TireMinder have Flow-Through Transmitters/Sensors?

We do not have flow-through sensors, but we do have Flow-Through Adapters (found here). These can convert our regular transmitter into a flow-through transmitter while still retaining the same weight and size of a normal flow-through transmitter/sensor.

Does the booster need to be powered 24/7?

Yes, our signal booster should be powered 24/7 while traveling.

While in storage, you may disconnect, or use a cut-off switch to stop the booster from draining power.

Please note, the signal booster draws very little energy. At 23.7mA, the booster would take a very long time to drain a battery. For a neat calculator that can tell you how long it would take for the booster to drain your battery, please click here.

For instance, it would take 98 days for the signal booster to drain a 80 AH battery (remember, 1 amp (A) is 1000 milliamps (mA)). Many batteries used in RVs are 200 AH or higher, which would translate into 246+ days to drain the battery.

Can I use a tire balancer with my TireMinder TPMS?

Equal can be used as a tire balancer with the TireMinder TPMS installed. Please note, in order for the Equal to properly work with the sensors the installer should replace the valve core of each tire that Equal is being put in (the bag of Equal comes with a replacement valve core). Also, we recommend to only check the tire with a tire gauge when the valve stem is near the top of the rotation (Equal will cause the air to leak from the tire if the valve stem is near the bottom).

If you would like to avoid these issues, we recommend having the tire balanced by machine. Remember, a tire does not need to be rebalanced upon adding our TireMinder transmitter.

Why can I only use the TireMinder Flow-Through Adapters on metal valve stems?

The majority of Class A MotorHomes will have steel or metal valve stems (nickel, brass with chrome plating, or a number of other combinations). When we state "metal valve stems" we are referring to the fact that the valve stem is attached to the wheel/rim with a metal device, such as a nut, and is in fact a metal or a non-aluminum alloy.

There are brass valve stems that fit in the category. However, the majority of brass valve stems are surrounded by rubber and use rubber connections to connect to the wheel/rim, making the connection vulnerable to deterioration. The added weight of the TireMinder Flow-Through Adapter coupled with the TireMinder Transmitter may exacerbate the natural deterioration of the rubber valve stem. This is why we do not recommend using the TireMinder Flow-Through Adapters with rubber valve stems.

In regards to aluminum valve stems, you do not need to worry about having aluminum valve stems on your MotorHome. Aluminum is only going to be found on cars, light trucks and SUVs. The TireMinder Flow-Through adapters are NOT COMPATIBLE with aluminum valve stems as it is a dissimilar metal than the metal used on the Flow-Through Adapters. Over time, dissimilar metals will fuse together and destroy both the aluminum valve stem and the TireMinder Flow Through adapter.

Can I use the TireMinder System on my Boat Trailer? Can the transmitters be submerged?

You can absolutely use the TireMinder system on your boat trailer. However, do not leave the transmitters submerged for long periods of time (>30 minutes).

More Tips & Tricks

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TireMinder Booster Installation - Tips & Tricks

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Can I use a TireMinder TPMS with my motorcycle?

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