HVACopedia

KeepRite · Heat pump

84 High pressure lockout

High severity KeepRite *SA/*SH Single-Stage CommunicatingKeepRite *CA/*CH Two-Stage Communicating

What the control is telling you

High-pressure switch tripped on 3 cycles in a row. Locked out 4 hours or until 24 V is cycled.

Applies to: KeepRite *SA5/*SA6 AC and *SH4/*SH5/*SH6 HP single-stage communicating; *CA7/*CA9 AC and *CH6/*CH9 HP two-stage communicating

Likely causes

  • See code 31

Test and repair steps

  1. Fix the high-pressure cause (fan, coil, charge).
  2. Cycle 24 V to clear.

Models that show this code

11 models in KeepRite *SA/*SH Single-Stage Communicating, KeepRite *CA/*CH Two-Stage Communicating

*CH624*CH636*CH648*CH660*CH924*CH936*CH948*CH960*SH4*SH5*SH6

Other codes on the same units

  • 56 Air and coil sensors disagree
  • 71 Low stage thermal cutout
  • 72 Compressor thermal cutout (two-stage: high stage)
  • 73 Contactor stuck closed
  • 74 No 230 V at compressor
  • 81 Low stage thermal lockout
  • 82 Thermal lockout (two-stage: high stage)
  • 83 Low pressure lockout

Save it for the next call

Star this code in the HVACopedia app and keep the whole library on your phone for jobs with no signal.

Open the app

Source: KeepRite/ICP C4A3/H4A3/T4A3/CXA6 Installation Instructions 421 01 5103 05, Table 1 Status Codes, p.17; KeepRite_ICP_KeepRite_Tempstar_Heil_split_A_C_HP_R_410A_R_22_service_421_08_5400_04.txt - section Table 13 Status Codes (single-stage); KeepRite_ICP_KeepRite_Tempstar_Heil_split_A_C_HP_R_410A_R_22_service_421_08_5400_04.txt - section Table 17 Troubleshooting (two-stage). 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.