I have a 3 year old Carrier Infinity heat pump. Over the past 30 days, it has started raising the following errors:
83 - Low Pressure Lockout 4 Hours
32 - Low Pressure Switch Open
The system is a 4-zone, 4.5 ton system.
The system does not consistently raise the error, and when the heat pump runs, it blows warm air. When the system raises the error, there is no ice on the outside unit - everything looks normal. The system "compensates" by running the first stage of strip (auxiliary) heat which, of course, costs more money.
I had a commercial HVAC acquaintance tell me he thinks its the switch that needs to be replaced, and he says that would involve recovering/replacing the refrigerant.
Before I call out a tech, I would appreciate your thoughts.