Published August 18, 2026 · Real Liquid HVAC field repair

01 · Completed repair

Three important components addressed

Liquid HVAC replaced the compressor and printed circuit board (PCB) control board on this Goodman 20 SEER system. A surge protector was also installed at the outdoor electrical disconnect.

  • Replacement compressor
  • Replacement PCB control board
  • HVAC surge protector installed
Completed work

Goodman 20 SEER compressor and PCB control-board replacement with added surge protection.

02 · Component roles

Refrigerant operation, system control, and electrical protection

The compressor is central to the system’s refrigerant circuit, while the PCB control board manages key electrical and operating commands. Both components must be appropriate for the specific equipment and installed using system-specific procedures.

The surge protector adds a layer of protection against transient voltage spikes that could affect sensitive HVAC electronics. No surge protector can prevent every type of electrical damage, but proper surge protection can help reduce the equipment’s exposure.

03 · Real field photos

The repair in progress

These are actual photos from the job, showing the outdoor system opened for service, control-compartment work, and the surge protector at the disconnect.

Outdoor HVAC unit with its service panel open and repair tools arranged beside it
Tools and service equipment staged during the Goodman 20 SEER compressor and control-board replacement.
Liquid HVAC technician crouched beside the open control compartment of an outdoor HVAC unit
A Liquid HVAC technician completing work inside the system’s open control compartment.
Open HVAC electrical disconnect with a surge protective device mounted beside it
The outdoor disconnect and surge protective device during the electrical portion of the repair.

04 · Why diagnosis matters

Major repairs should be based on testing—not assumptions

Compressor and control-board problems can overlap with other electrical or refrigerant issues. Proper diagnosis helps identify the affected components before repair decisions are made.

High-efficiency equipment combines refrigerant, electrical, and electronic controls. A complete repair requires the correct parts, careful installation, and verification of the system’s operation after the work is completed.

05 · Added protection

Why add an HVAC surge protector?

Modern HVAC systems can contain sensitive electronic controls. A properly installed HVAC surge protector is designed to help divert transient voltage spikes before they reach the equipment.

Surge protection does not guarantee that equipment can never be damaged, and it does not replace proper grounding or electrical maintenance. It is an additional layer of protection for an important home system.

06 · Safety note

Leave compressor and electrical repairs to a trained technician

Outdoor HVAC equipment contains high-voltage electrical components and refrigerant under pressure. Do not open equipment panels, touch wiring, or attempt compressor or control-board repairs yourself.

A qualified HVAC technician should inspect, diagnose, and service the system using the correct tools and safety procedures.