My electric bill has almost doubled this month (now over $300) and I'm trying to determine if the A/C is the culprit. I measured the amperage draw of my CPKE42-1B Goodman compressor and each 120v leg reads 16.9amps. Does this mean the total amperage draw is 33.8 amps? This seems high to me but I don't know, I couldn't find a spec sheet for this compressor. The outside average temperature has been 83 for the month of June and the temperature was 83 degrees when I measured the amperage draw from the compressor.
Also, the temperature differential from the A/C is only 11 degrees (i.e. 76 degrees inside, AC blows 65)
I'm trying to determine if I should upgrade the entire A/C system and if it would save me money within three years (where moving in about 4 years). I can purchase an American Standard system at cost through a friend/dealer. I'm thinking their Heritage 15 SEER would probably be most economical but I haven't seen any figures yet.