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Rooms at different temps / stratification

What is going on

Possible causes and checks for: rooms at different temps / stratification.

Likely causes

  • No air movement
  • Stat too high/low
  • Outlets/returns poorly placed
  • Unbalanced ducts
  • Room starved (more return than supply)

Check in this order

  1. Run blower continuously
  2. Relocate stat
  3. Balance (long/short method)
  4. Add supply
  5. Door undercuts

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Source: General HVAC service practice — verify per model. Written in our own words; check the manual for your exact model.

For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.