installed new whirlpool water heater….pressure valve keeps going off….temperature set at 120..pressure into house is not out of line…I do have a peak, non peak meter at the fuse box that i believe the electric company installed…..it turns on power to water heater during non peak times….old water heater did same thing, thought that new one might take care of problem…new whirlpool has diagnotic info on top….power doesn’t come on to unit till box at fuse box allows it to….not sure if i should call a plumber or electrical….