When it comes to transformers, most people are completely lost. If your neon sign stops working, works sometimes and cuts off, smells like burning, gets overheated or only lights up part of the sign, it just may be that its time to replace your neon transformer.
Neon transformers are much like batteries. They go bad over time and you will need to replace your
neon power supply every 2-5 years depending on power, surges and general usage. When its time replace that transformer on your
neon sign, you merely need to match the output of your existing power supply or get a bigger one.
Neon power supplies are self adjusting which means that the power supply will push as much power as your sign actually needs. So getting a bigger power supply in some cases is not a bad idea at all. Once you receive your replacement unit, its just a matter of reverse engineering the existing unit. The hardest part is removing the rubber boots. Those will be generally hard and sometimes brittle. The easiest way to do this removal is to heat them up with a hair dryer or heat gun. Get that rubber warm as possible and slowly wiggle the rubber boots off the sign. Once removed, just untwist the wires and wire in your new transformer. Simple and easy.