What are your thoughts on adding TEV's to a 2 Ton, A410 heat pump?
If my current situation requires a complete pump out, purge and re-install of refrigerant, would it be advantageous to install TEV's to replace pistons?
My HVAC tech says it is half a dozen of one and six of the other unless the culprit is one of the existing valves.
He says it helps under certain circumstances but also adds one more thing that could go wrong in the future. He said a correctly sized and installed unit should not absolutely require them.
The extra cost at this time would be about $200 for valves and hard start capacitor.
Any comments on TEV's vis-a-vis A410?