Air Conditioning
Frequently Asked Questions


  1. How long will the Comfort Control Board used in the JEZ Series store the codes if no new faults are experienced?
  1. What is a 2-stage air conditioner?
  1. How does the 2-stage air conditioning work?
  1. How can I tell if the unit is in first or second stage of cooling?
  1. Are there any after market start assist kits approved by Rheem?
  1. How long will the Comfort Control Board used in the JEZ Series store the codes if no new faults are experienced?

  • The faults are stored indefinitely until they are overwritten or erased by the technician.
  1. What is a 2-stage air conditioner?

  • The 2-stage air conditioner will let the air conditioning system run at a lower capacity in cooler weather and at a higher capacity during hot weather. This operation will give a better comfort level for the user because of longer run times and better de-humidification and air circulation.
  1. How does the 2-stage air conditioning work?

  • The 2-stage air conditioner has a Copeland Scroll compressor that will pump at approximately 67% percent of capacity on a call for first stage cooling on Y1 terminal.

  • If the thermostat is not satisfied and the temperature rises, typically three degrees above the set point, a call is made for second stage cooling on Y2 terminal, the compressor will operate at 100% capacity. The unit should operate at second stage until the thermostat drops back to first stage. This will continue until the thermostat is satisfied.
  1. How can I tell if the unit is in first or second stage of cooling?

  • The Integrated Compressor Control has an LED display module. If the compressor is running in first stage a lower case "c" is displayed. If in second stage a upper case "C" will be displayed.
  1. Are there any after market start assist kits approved by Rheem?

  • Yes! Rheem has approved the use of the 1P100-ST soft start distributed by Superior Technology & Supplies Corp. of Waipahu, Hawaii for use on single phase air conditioning or heat pump units from 1.5 thru 5 ton. The use of this device will not violate the equipment warranty. Click here for a copy of the approval letter.

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