In 2005 Honeywell introduced the SnapLamp feature. These newer units have a bulb that detaches from the knob, thus service only requires replacing the bulb. Earlier units had the knob and bulb affixed with epoxy and thus both the bulb and knob needed to be replaced as one assembly.

Customers that have the earlier knob-bulb assembly need to purchase the new detachable bulb assembly. Then future service only will require purchasing the bulb only.

Bulb-knob assemblies with the detachable bulb are labeled. The label will note the replacement part number UC18W1004 or UC36W1006. The new knob-bulb assembly may have the blue or slate color scheme.

(Click here for detailed diagram of Bulb-knob Assemblies)