If you have electrical experience, you can follow the next steps. Contact a local HVAC contractor if you do not feel comfortable or do not have electrical experience.

• Make sure that the contactor is engaged and that you are getting continuity across the contactor, which means that your meter shows continuity from L1 to T1 and L2 to T2 or if the power is on that you are getting 240v at both the L1/L2 (house line power) and T1/T2 (equip. power) side.

• Sometime a contactor will engage or close but not bridge power to the LOAD (T1/T2) side. This can be caused by a faulty contactor or may be caused by ants and insects that have crawled inside the contactor and died which blocks the electrical current from flowing across to the unit. I don’t recommend trying to clean and reuse a contactor that is clogged with debris or bugs as they will continue to malfunction and could short out. Replace a contactor that is faulty or damaged

• If the contactor is engaged and is bridging power to the T1/T2 equip. side but the AC does not come on at all you may have to

• If the outdoor AC condenser fan comes on but not the compressor:

  1. The capacitor may be faulty and needs to replaced.

  2. One or more of the high voltage lead wires that run to the compressor has burnt off or is disconnected.

  3. One or more of the compressor power wire terminals has burnt off or disconnected.

  4. The compressor may be faulty or have an internal short

• How to Replace a Thermostat Buy Thermostats Buy HVAC Parts

• How to Replace a Contactor Buy Contactors

• How to Replace a Capacitor Buy Capacitors

• Contact a local HVAC contractor