There are a few reasons this may be happening. We recommend taking the following steps to identify any potential cause.
Check the battery for correct voltage. Open battery compartment, remove the battery and disconnect battery wires. Check the battery voltage with a volt meter. A fully charged battery should output between 11-14 volts. If it is under 11 volts the battery needs to be recharged. Click here for troubleshooting battery specific problems.
Check for blown fuse.. Your CoilJet includes a 15amp fuse located in the base of the unit. Under special conditions, this fuse may blow to protect other components. To locate the fuse remove the six screws on the bottom cover of the unit. Locate the yellow fuse holder and check its condition. Replacement of the fuse is with a standard in-line 15 amp fuse.
Check for loose or damaged wiring. In extreme cases wiring can become loose or damaged, either through shock/vibration or accidental chemical spills. With the base cover still off, check for this condition. If you find loose or damaged wiring, please contact us.
Check the battery charger. The battery charger should be producing between 12-14 volts. Plug the battery into a working wall socket. DO NOT PLUG INTO COILJET UNIT. If it is flashing red, the unit needs to be replaced. If the light is green, use a voltmeter to check the output. If it is not measuring between 12-14 volts, it needs to be replaced. Please contact us for replacement.