In cases where the UV lamp fails to ignite, you may visually inspect the UV lamp by loosening the two large thumb screws on the assembly, carefully lift the UV assembly and look through the glass window on the bottom of the assembly. There are rare cases where the lamp is shattered. Normally, the bulb will have some dark discoloration. The bulb filament may be broken, but this would be very difficult to see. Also, check the two cable connections to the UV lamp assembly to be sure they are fully seated.
If you are still having difficulty with your UV lamp, please contact our tech support team for more information.