Ok - I noticed my HVAC wasn't cooling like it used to.
10 year old York 4 ton unit.
The symptom is, it will cool GREAT, then sometimes, it wont get lower than 70 degrees at the register.
Had a tech come out - he said someone put too much freon in.... let some out to get the pressure right.
Now.... it still does the same thing. When it works, it works great.... (even better than before) and puts out 55 degrees at the register with a 78 internal temp (23 degree drop). Outstanding.
Other times, when it cycles on - the register will not drop below 70 degrees.
This means, I know it is cooling.... because it is cooler than ambient at the register, but it isnt cooling where it should.
Filter is always changed, it isnt freezing up inside or out (checked), and gas is good (same problem before tech let some out to be optimal)
Compressor is running as is outside and inside fans.... all coils are clean.
Help! What can cause a system to run great sometimes, and then other times hardly at all?