ThermaCELL Heated Insoles Boot and Shoe Warmers Frequently Asked Questions

Heated Insoles

Charging and Batteries

Remote Control

Global Charger

Heated Insoles

Q: What temperature should my Heated Insoles get to?
A: Your heated insoles regulate to a temperature of 111 degrees F on High and 100 degrees F on Medium. The surface of the insole will reach this temperature when enclosed in footware as it was designed to do. Exposing the insole to the open air, as if on a table, will cause the insole to become cooler on the surface than intended.

Q: My feet aren’t staying warm when using my Heated Insoles, but they do produce warmth. What should I do?
A. If your feet are not staying warm when you are using your Heated Insoles, but they are producing heat, there are some suggestions we have. For optimal performance of the Insoles:

  1. Make sure your shoes or boots are completely dry inside.
  2. Insoles should be turned ON at the first sign of a chill. It is better to be proactive rather than reactive with this product.
  3. Make sure there is some space/air between the tops of your feet and the top of your boot. The air between will act as insulation. If the top of your foot is pressed against the top of your boots, cold from the outside will transfer quickly into your foot.
Q: Should I be concerned about stepping on an object that could puncture my footwear and insole(s)?
A: This product should not be used in any environment where there is a likelihood of it being punctured by sharp objects underfoot. Under no circumstances should a battery/insole that has been punctured be connected to the charger.

Q: If I notice that my product is damaged, what should I do?
A: When the product is removed for charging, if there is an any indication that the product has been punctured (for example by a nail or a thorn), it should not be used or recharged. For ThermaCELL Heated Insoles ProFLEX specifically, when the battery is removed for charging, if there is any indication of damage to the battery case (e.g. cracked or punctured), it should not be used or recharged.

Q: My Heated Insoles don’t get “hot”. Is there something wrong with them?
A: Heated Insoles create an optimal warm environment inside your boot, they don’t get “hot” to the touch. They will never get as hot as your disposable “Toasty Toes” or similar products. The reason: Heated Insoles are meant to keep your feet comfortable and warm in cold weather. They maintain a temperature inside your boot of 100° or 111° (depending on the temperature setting chosen). Any warmer, and your feet would sweat, and they would put you in an even worse situation.

Also, Heated Insoles are thermostatically controlled. So, if the insoles are in a warm environment, they will most likely not get warm to the touch. They activate when needed. For example, think of your house. If your Thermostat is set to 70° and the temperature in your home reaches 70°, your heat will shut off until needed again.

Q: The Heated Insoles feel stiff. Will this change?
A: Yes, the Heated Insoles boot and shoe warmers will compress as you wear them. They will contour to your feet.

Q: Do ThermaCELL Heated Insoles boot and shoe warmers work in all kinds of footwear?
A: Heated Insoles work in most types of shoes or boots. They fit best in shoes or boots that have removable insoles.

Q: Do existing insoles need to be removed from footwear before inserting Heated Insoles?
A: No. But to ensure a perfect fit with Heated Insoles, you can remove the existing insoles if needed. Also consider the thickness of the socks you’ll be wearing.

Q: Are there any medical foot conditions that get worse because of heat?
A: If you suffer from any medical foot conditions, consult your physician before using Heated Insoles boot and shoe warmers.

Q: Are ThermaCELL Heated Insoles waterproof?
A: Heated Insoles are water resistant, not waterproof. The warranty does not cover Heated Insoles being submerged in water. They may function properly after being dried out, but there is no guarantee.

Q: What can I do if Heated Insoles become wet?
A: If Heated Insoles become wet, air-dry them completely before charging them or wearing them again. Do not place the product on a radiator or any other hot surface, because they contain lithium-ion polymer batteries.

Q: If I cut beyond the solid line while sizing Heated Insoles, will they still work?
A: Cutting beyond the solid line can damage the heating elements and the product, depending on where and how far beyond the line the cut is made. The product may still work; however, the Heated Insoles bonding may be weakened, causing premature failure.

Q: Should I turn on the Heated Insoles before putting them in my footwear?
A: Yes. For the original (red) insoles, the switch at the heel of each Heated Insole should be turned to the on position before putting them into footwear. For ProFLEX insoles, once the batteries are inserted, the insoles are on.

Q: What should I do if the black soft plastic cap at the rear of the Heated Insoles will not close?
A: Heated Insoles will still work even though the black plastic cap is not closed. The cap is for moisture and dust protection. You should avoid getting foot powder in the area of the charging receptacles. This question is only applicable to the original (red) ThermaCELL Heated Insoles.

Q: How do I know the Heated Insoles are working?
A: The LED on the insoles will flash (for original insoles the LED is located at the heel of each heated insole, on ProFLEX it is under the lip of the battery) either in groups of 2 or 3 lights, depending on the heat setting selected. This means the Heated Insoles are in the heating mode. You should feel the warmth on the upper and lower surfaces of a heated insole when it is held to your hand or cheek.

Q: What can I do if my Heated Insoles are too hot, even when set on the medium setting?
A: To maintain a comfortable heat level while using Heated Insoles, first make sure they are properly installed. Temperature comfort will also depend on the type, fit, and dryness of the socks and footwear you wear. You can use the no heat setting on the Heated Insoles for a period of time until more heat is needed.

Q: What heat setting should I use when doing vigorous activity?
A: When doing strenuous work, power walking, snowshoeing, or cross-country skiing, Heated Insoles should be in no heat mode. At high exertion levels, the body generates enough heat to keep feet warm.

Q: What should I do if the temperature of the Heated Insoles doesn’t change when I turn the switch to high or medium?
A: Check to make sure the LEDs on the Heated Insoles are flashing in groups of 3 (indicating they are on the high setting) or in groups of 2 (indicating they are on the medium setting). If the LEDs are not flashing, fully discharge the Heated Insoles and then recharge them. If this still does not fix the problem, please “re-key” or “re-pair” your ThermaCELL Heated Insoles with the remote control using the instructions on the Product Help Page.

Q: Can I turn off the Heated Insoles any time or do I have to wait until they completely discharge?
A: You can turn off Heated Insoles at any time.

Q: How do I turn off Heated Insoles?
A: There are two ways to turn off Heated Insoles:

  • If the Heated Insoles are not going to be used again immediately, remove them from your footwear to turn them off. For the original (red) insoles, turn the switch on the heel of each heated insole to the off position. For ProFLEX, pull the battery put.
  • If the Heated Insoles are going to be used again immediately, switch the remote control to the no heat setting.
Q: My Heated Insoles worked for a while, but now they are not working. What should I do?
A: Make sure the Heated Insoles have a charge remaining. To do that, check to see if the LEDs on the heated insole are flashing. If they are not flashing, fully recharge the Heated Insoles.

Q: How do I clean the Heated Insoles?
A: Clean Heated Insoles only with a damp cloth.

Q: Do existing insoles need to be removed from footwear before inserting Heated Insoles?
A: No. But to ensure a perfect fit with Heated Insoles, you can remove the existing insoles if needed. Also consider the thickness of the socks you’ll be wearing.

Charging and Batteries

Q: What precautions should I take while or before charging my ThermaCELL Heated Insoles?
A: For Original Insoles: please be sure to only insert the Heated Insoles charger into the charging port on the heel of your ThermaCELL Heated Insoles. Make sure not to insert the charger into the gaps to the left or right of the charging port, this could damage your Heated Insoles and cause them to malfunction. For ProFLEX: make sure you are inserting the batteries into the charging case as indicated in the operating instructions.

Q: Should I take any precautions for long-term storage of my ThermaCELL Heated Insoles?
A: For long-term storage of ThermaCELL Heated Insoles, please charge the insole batteries fully before storing them. They should be stored in a cool, dry place. It is suggested to recharge the insoles every few months to maintain peak charge.

Q: How long will it take to charge the batteries in my insoles?
A: It will take up to 4 hours to charge your ThermaCELL Heated Insoles.

Q. Will I damage my Insoles if I leave them plugged in (charging) for a long period of time?
A. No, leaving your ThermaCELL Heated Insoles plugged in (charging) for a long period of time will not damage the insoles.

Q. How hard should I push the charger into the back of the Insole?
A. You should push the charging jack into the charging port on the back of the Insole until it “clicks” into place.

Q: How long will Heated Insoles remain charged?
A: Depending on the outside temperature and the insulating quality of the shoes or boots, fully charged Heated Insoles will run about 5 hours on medium setting and about 3.5 hours on high setting.

Q: Can I recharge Heated Insoles before they are fully discharged?
A: Yes.

Q: If I leave the Heated Insoles power switch in the on position while charging the Heated Insoles, will I damage them?
A: No. But it is recommended that the switch be in the off position during charging.

Q: How many times can Heated Insoles be recharged?
A: Heated Insoles can be recharged over 500 times.

Q: Can the batteries in the Heated Insoles be replaced?
A: Batteries in the original ThermaCELL Heated Insoles cannot be replaced.  Batteries for ThermaCELL Heated Insoles ProFLEX can be replaced.

Q: I followed the directions for charging the Heated Insoles product, but they did not get hot at all or are not heating incorrectly. What should I do?
A: If the Heated Insoles are not getting hot at all, follow these steps:

Drain the batteries of both Heated Insoles completely. To do this, turn the Heated Insoles on using the on/off switch at the heel of the original (red) Heated Insoles, and for ProFLEX insert the batteries. Use the remote control to turn the Heated Insoles to the high setting. Let them run until the LED lights on the Heated Insoles turn off. Then recharge them.

If the Heated Insoles are not heating correctly, follow these steps:

Ensure that the Heated Insoles or ProFLEX Batteries are charged completely. Disconnect the charger. Turn the Heated Insoles to on. The LED light on each Heated Insole will flash once every few seconds. On the remote control, press the high button. Now the LED light on each heated insole will flash in groups of 3. Place the Heated Insoles in the refrigerator for 5 to 10 minutes. Take the Heated Insoles out of the refrigerator. Check the LED lights on both Heated Insoles. The lights should be flashing in groups of 3. If the lights of both Heated Insoles are flashing in groups of 3, then the Heated Insoles are in heating mode. Hold them to your hand or cheek and you should feel warmth on the upper and lower sides of each of the Heated Insoles.

Remote Control

Q: My remote is not working. What can I do?
A: First, check the remote to ensure the plastic tab has been removed. Then, press any button on the remote control and look to see if the LED on the remote control flashes. If the LED does not flash, put a fresh battery in the remote control. Also check to make sure the Heated Insoles are charged and on. If none of the above steps solves the problem, call customer service at 61-2-8811 3716.

Q: How long does the remote control battery last?
A: The battery should last up to two years with normal usage. But to ensure uninterrupted service from the remote control, replace the battery annually.

Q: I tried to activate the Heated Insoles using the remote control, but the LEDs on the Heated Insoles do not flash. What should I do?
A: Make sure the Heated Insoles are on and are fully charged. If the Heated Insoles are not charged, follow the charging directions in the ThermaCELL Heated Insoles Instructions and try activating the Heated Insoles again. If the LEDs on the insoles still do not flash, please try to re-key your remote to the insoles (instructions can be viewed here) or call customer service at 61-2-8811 3716.

Q: After activating the Heated Insoles with the remote control, they don’t feel warm. Is this normal?
A: Yes, if the remote control is set to the no heat setting, you will feel no heat. But if the remote control is set to the medium or high setting, and you feel no heat, check to see if the LEDs on the Heated Insoles are flashing in groups of 2 (for the medium setting) or 3 (for the high setting). After 5 minutes, if you still feel no heat, call customer service at 61-2-8811 3716.

Q: What does the no heat setting on the remote control mean?
A: The no heat setting means that no heat is being generated by the Heated Insoles. It is a standby setting indicating that the remote control is active and waiting for a command.

Q: Can I get a replacement remote control?
A: The remote control is under warranty for defects for one year from the date of purchase. Contact customer service at 61-2-8811 3710 for assistance or you can purchase a remote control from this website.

Global Charger

Q: The LED light on the global charger will not continuously glow green, even after 3 hours of being plugged in. Are my Heated Insoles charged?
A: Continuously glowing green is not how the LED on the global charger indicates a full charge.

Q: The LED light on the global charger does not glow green when plugged into a wall outlet. Does that mean the charger is not working?
A: If the charger is receiving power, the green light should be on. Make sure the electrical outlet is working, or try a different outlet. If the charger still does not have a green light when it is plugged in, call customer service at 61-2-8811 3716.

Q: Can a wall charger other than the ThermaCELL brand global charger be used to charge the Heated Insoles?
A: No. Do not use other charging devices to charge the Heated Insoles.