u/Chemical_Olive485

I bought this Reta a few months back I used the first bottle but it seemed to not work it seemed weak even after raising my dosage did anyone else experience this problem with this batch it’s the Reta 20mg black cap qr is their to check if you had the same batch as me.

I have a super old cold air only setup just got a nest learning thermostat but it says it needs more power my unit is in my attic and is old it lacks a board where I could easily locate where to add a c wire so I have to scramble through all these wires I guess to be able to wire up a c wire but have no idea where to start or how to do it could anyone give me any ideas ? On how to do it