Tuesday, November 19, 2013

Should The Outdoor Unit Run Continuously?

Below the balance point, around 30 ° F it is normal for the outdoor fan to continually run. If the outdoor unit continually runs during normal heating (30 °-50 ° F outside), possible problems are:

  • Thermostat set too high
  • Thermostat needs adjustment
  • Low refrigerant level in unit
  • Thermostat exposed to cold draft
  • Outside unit coil is blocked by snow, ice, etc.

If the outdoor unit continually runs during normal cooling, possible problems are:

  • Low refrigerant level in unit
  • Very warm weather (over 90 ° F)
  • Thermostat located near heat source, such as appliances, TV, etc.
  • Dirty filters or too many registers closed limiting air movement
  • Improperly designed duct work
  • Unit may be undersized

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