Q1: Should I repair or replace my 14 year-old Carrier 10 SEER 5 ton unit in North Central New Mexico? (Model 38CK060330)
It is intermittently tripping the circuit breaker. When the breaker is reset, the unit runs for a few seconds, stops for a few seconds, then trips the breaker as it trys to restart. The technician replaced the small 24V line leading from the house to the compressor, stating that by moving it, he was able to force the compressor on and off.
A few days later I came home to find the breaker tripped again. This time the same tech brought a (compressor?) tester and says that, while the compressor checks out OK, he can't tell if the high pressure switch is bad or the wiring associated with it. (When bypassed temporarily, the unit runs OK.)
The cost of replacing the switch is about 25% of the cost of a new 13 SEER compressor, but he says the old 10 SEER inside coil would have to be replaced, too. Q2: Is a new "A Coil" replacement coil required, good practice or both?
Q3: If I elect to replace the entire system, would a new furnace also be in order? If so, any recommendations on AC? Furnace?
Q4: All this for a bad switch?