Yes, just use one pole. The other pole is then in effect an unused spare.
contactor
Yes. Can blow capacitor, contactor or ground compressor.
compressor contactor is bad. probably stuck in the closed position.
You can find air conditioner parts to replace the old ones on your current air conditioner in an electronic store (or where you bought your air conditioner) or on the internet.
no
It could be you have a stuck fan relay, a contactor that is sticking, or your thermostat is bad.
If the power requirement is 120 volts it will be connected to a single pole breaker rated at the amperage requirement of the air conditioner. If the voltage of the air conditioner is 240 volts, then a two pole breaker will be required.
Is it feasible and approximately how much will it cost to replace the air conditioner in my '91 Miata with a unit that does not use freon?
The cost to replace a coil in an air conditioner typically ranges from 500 to 1500, depending on the type of coil and the complexity of the installation.
replace air condicioner filter
Common signs of a bad AC contactor include the air conditioner not turning on or off properly, frequent cycling, or a humming noise. To diagnose a bad contactor, visually inspect it for signs of burning or wear, and use a multimeter to test for continuity. If the contactor is faulty, it can be replaced by disconnecting power, removing the old contactor, installing a new one, and reconnecting the wires.
Both a dehumidifier and an air conditioner remove moisture from the air. Both a fan and an air conditioner move air. An air conditioner, however, cools air which a combination dehumidifier and fan can not do. If it is hot, and especially if there is an elderly person liable to suffer from heat stroke or heat exhaustion, an attempt to replace air conditioning with a dehumidifier and a fan could lead to death.