I happen to have a friend in HVAC. I bought some gauges and basic tools and he trained me on troubleshooting the AC, its really helpful. Having redundancy or a

I happen to have a friend in HVAC. I bought some gauges and basic tools and he trained me on troubleshooting the AC, its really helpful. Having redundancy or at least a backup plan is better. You have to consider all of the risks and what is at stake and how much downtime you can handle.