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Bryant 83: Low pressure lockout for 4 hours, elevated from fault 32 after 3

Source: Bryant manual (PDF) (opens in a new tab) ↗ · Updated

Status code83Bryant
What does Bryant 83 mean?

Low pressure lockout for 4 hours, elevated from fault 32 after 3 occurrences. The outdoor unit stops retrying the 6-minute trips.

Homeowner part this code names: AC coil cleaner.

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Call a pro: jump to when to call a pro Equipment type: AC / heat pump
How it shows: Amber status LED on a Bryant 288BNV Evolution heat pump or 189BNV air conditioner. A short flash is 0.25 seconds on and a long flash is 1.0 second on. Code 83 is 8 short and 3 long

Bryant outdoor 83 is a low-pressure lockout for 4 hours, elevated from fault 32 after 3 occurrences. The 6-minute trip is code 32. Causes listed for 83 include a service valve left closed, an undercharged system, low indoor airflow in cooling, low outdoor airflow in heating, an EXV problem in heating, a restriction in the filter drier, and an expansion-device restriction. In cooling, check the indoor coil for ice or debris. In heating, check the outdoor coil.

Likely causes

  • Service valve left closed
  • Undercharged system
  • Indoor airflow too low or off in cooling
  • Outdoor airflow too low or off in heating
  • EXV malfunction in heating
  • Restriction in the filter drier, expansion device, circuits, or tubing

Safe checks for 83

  1. In cooling, with power off, check the indoor coil for ice or debris. In heating, check the outdoor coil for ice or debris
  2. Technicianconfirm the service valves are open, check charge with the manual's method, and troubleshoot the EXV or TXV and the filter drier
Safety firstOutdoor units carry line voltage even when the thermostat is off. Switch off the unit's disconnect and breaker before touching anything. Refrigerant, wiring, compressor and control-board work must be done by a licensed HVAC technician.

Capacitors can hold a charge after the power is off. Safety terms.

When to call a pro

Call a licensed HVAC technician. The 4-hour lockout means code 32 already happened three times. Do not add refrigerant to clear it.

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Parts & tools for this fix

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AC and heat pump coil cleaning supplies: guide

In this code: In cooling, with power off, check the indoor coil for ice or debris. In heating, check the outdoor coil for ice or debris

Robinair 18403 fin comb / straightenerSearch: No-rinse foaming coil cleanerSearch: Soft brush for AC fins

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Related Bryant AC / heat pump codes

46Brownout48Lost inverter communications, elevated from fault53Outdoor air temperature sensor fault55Coil temperature sensor fault56Outdoor air and coil thermistors out84High pressure lockout for 4 hours,

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