My son had a control panel go out on a water heater. Estimate from the plumber that came out was $1600 to replace the panel or $3200 for a full replacement. Son in law found the panel at a plumbing supply company for $280. Took my son less than 15 minutes to replace it. Basically 4 color coded wires and a mounting bracket. Needless to say: Won’t use that company or recommend that company to anyone.