Before attempting to add refrigerent to a system, you must FIRST check the state of charge of the system. That means a guage must be used to see what the initial state of charge actually is. If there is an electrical problem and you try to force more refrigerant into an already fully charged system, you will simply create more problems.
I posted some testing info along with pictures back in May or June on how to check parts of the electrical circuits for the A/C system. A search should bring them up.
Steve
