Low pressure trip: the control elevates to fault 83 (low pressure lockout) after 3 occurrences. Reset time is 6 minutes.
Homeowner part this code names: AC coil cleaner.
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Carrier 32 is a low pressure trip, not the high-pressure switch (31) and not the 4-hour lockout (83). Count 3 short flashes and 2 long flashes. Reset time is 6 minutes. After 3 trips the control elevates to fault 83. The manual points 32 at the fault 83 cause list: a closed service valve, an undercharged system, low indoor airflow in cooling or low outdoor airflow in heating, an EXV or TXV problem, and a restriction in the filter drier or the circuits. In cooling, the homeowner check is the indoor coil for ice or debris. The outdoor coil is the second check, including in heating. Fan-motor diagnosis, charge, service valves, and the expansion device stay with a technician.
Likely causes
- The service manual points code 32 at the fault 83 cause list
- Closed service valve
- Undercharged system
- Low indoor airflow in cooling, or low outdoor airflow in heating
- EXV or TXV problem
- Restriction in the filter drier or the refrigerant circuits
Safe checks for 32
- In cooling mode, check the indoor coil for clogging by ice or debris and clean or de-ice it if necessary (the manual also says to troubleshoot the indoor fan motor)
- Check the outdoor coil for clogging by ice or debris and clean or de-ice it if necessary (the manual also says to troubleshoot the outdoor fan motor)
- Technicianfollow the fault 83 table (service valves, charge, expansion device, filter drier)
Capacitors can hold a charge after the power is off. Safety terms.
When to call a pro
Call a licensed HVAC technician if 32 repeats or escalates to 83.
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AC and heat pump coil cleaning supplies: guide
In this code: In cooling mode, check the indoor coil for clogging by ice or debris and clean or de-ice it if necessary (the manual also says to troubleshoot the indoor fan motor)
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