HVACopedia

Carrier · Furnace

46.1 Momentary loss of power

Low severity 59SC6A

What the control is telling you

The control saw a brief interruption of power.

Applies to: Carrier 59SC6A

Likely causes

  • Utility power dip or brownout
  • Loose line-voltage connection
  • Blower door switch bouncing / door loose

Test and repair steps

  1. Check the line-voltage connections in the junction box for tightness.
  2. Measure supply voltage under load.
  3. Make sure the blower door is secure so the interlock switch stays closed.
  4. If the code repeats often, monitor power supply and check for loose breaker or disconnect.

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Source: Carrier 59SC6A Installation, Start-up, Operating and Service Instructions, Fig. 60 Service Label Information, p.54. Summarized in our own words; check the original manual for your model.

Homeowner looking at this code? See what it means for you and when to call a technician.

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.