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AC freezes up, but only on the same day, once a week.
Hello to all,
I replaced an old R22 condenser last year at the end of September. I left the furnace and inside coil. I charged the new unit with MO99. It froze up a week or so later and I came back and the pressures and super heat were fine. It has frozen up two more times this year. Pressures are always fine when I come back. Now here's the deal; the system only freezes on Saturday. The family is Jewish and they observe the sabbath. That means from sun down on Friday until sundown on Saturday, they don't adjust the thermostat. They leave the oven and a flame and a pot on the stove continually for 24 hours. It has never frozen during the week.
They had no problems over the winter with the blower. The blower always seems to be running. The only thing I noticed is that there are only three wires to the tstat. There is no G. The blower comes on through y I guess.