- Check your power supply and extension cords, etc. to ensure that they are working properly.
- Check your blanket for damage: puncture holes, rips, cuts, tears, nails, staples, form spikes or melted/deformed spots.
- Check the electrical resistance characteristics of your powerblanket using an ohmmeter. To do an ohmmetertest follow steps 1-4 below.
- Disconnect the plug/cord of your powerblanket from the power supply.
- Inspect the plug and cord for signs of damage. Do not use your powerblanket if it has a damaged plug or cord. If it is not damaged, please continue with the troubleshooting.
- Connect the ohmmeter to the blades of the plug on the powerblanket (Ref. image 1C). Compare the meter reading with that shown on the cord tag of your powerblanket (Ref. image 2C), (It should be that value +/-5%). If it is too low, there may be excessive moisture within the blanket or the heater may have been damaged.
- If it is too high, your powerblanket may have been damaged.
- There should be high electrical resistance from the ground post to either of the blades on the plug of your powerblanket. Connect the ohmmeter from the ground post to one of the blades (Ref. image 3C). Note the reading. Then, connect the ohmmeter from the ground post to the other blade on the plug. Both of these readings should be greater than 75,000 ohms (75 KOHM). The higher the better. A low reading indicates that your powerblanket has been damaged.