I had posted an earlier thread about what to expect with a service call for the A/C not cooling properly. I had a tech come out and look at the system a little while ago, and here is what he said:
- I asked him about static pressure, and told him the numbers I had gotten from an energy audit: He said
* 0.35" W.C. across a clean blue fiberglass filter was fine (shouldn't it be more like 0.05" - 0.10" if the system is designed properly?).
* static depended on the system and house, not the 0.5" W.C. allowable on the name plate
* said high static was common
* he didn't have the tool with him to measure static pressure, and he said that they don't do that for residential, only commercial.
- I told him about lowering the fan from High to Med/Hi (see other thread). He said he never would have checked if I hadn't mentioned it
- I asked about face velocities and asked him if the return drop might be too small. He said that that's way over his head (exactly what the last tech said).
- He originally set the blower speed for heat to medium low, which is definitely not enough air flow for the 80K output furnace. I asked him why, and he said you couldn't have the heat and cool on the same blower tap (I don't see why, because you would just splice the wires). I asked him about the heat exchanger cracking, and he said that there were plenty of "safeties" in place to prevent that from happening. I said I didn't want it tripping on the high limit, and he just said yeah. He just left the blower lead for heat unplugged.
- He said the system was a little low on freon, and he said he added a little under a pound. He said there was a 21 degree difference at the outside unit, and super heat was 12 degrees. I have no clue if that's good or bad, but he sounded like it was good.
- I asked him about it taking longer to cool the house down with the much reduced airflow. He said that would cool the house down faster.
It's been over 45 minutes since he left, and the temperature hasn't even cooled down 0.1 *F inside (it's 75.3 inside currently) - it's only 82 *F outside. What should I be doing now? I'm afraid you all are going to say get another tech. I don't have $+ to shell out on every visit trying techs until I find one that knows what he's doing (not a slam on the members of this forum at all... I wish one of you was in my area for sure ).