Residential Mitsubishi CITY MULTI Heat Pump Repair in Huntington Beach

A Huntington Beach homeowner’s Mitsubishi CITY MULTI heat pump wasn’t cooling properly, so they called our HVAC experts for help. We found a refrigerant leak in two of the system’s four indoor coils, plus rust on the coil from a bad drain design. Below is a breakdown of the problem, our AC repair solution, and the results.

Problem Diagnosis

Refrigerant Leak in Two Evaporator Coils

The home’s cooling performance had dropped noticeably. Our technicians traced the issue to low refrigerant (Freon) and pinpointed leaks in two of the four indoor evaporator coils. A refrigerant leak like this not only hinders cooling but can also damage the heat pump’s compressor if left unchecked.

Rust from Improper Drain Design

We also found rust on the coil due to water from an improperly designed condensate drain. The original drain line wasn’t set up correctly, causing water to collect in the drip pan. Over time, that standing water caused significant rust on the evaporator coil.

Repair Solution

Replacing Leaking Fan Coils

For a lasting fix, we replaced the two leaking indoor fan coil units with new coils. After installing them, we recharged the system with the proper refrigerant. This restored the heat pump’s full cooling power.

Redesigning the Drain Lines

Next, we corrected the drainage setup. Our technicians reworked the condensate drain lines with proper slope and routing to ensure water flows into the drain pan and safely outside.

Results: Restored Comfort and Reliability

After these repairs, the CITY MULTI heat pump system is back to keeping the home cool and comfortable. With no more Freon leaks, the new coils are performing efficiently, and the improved drainage means no more water damage or rust. The homeowner noticed better cooling right away and now has peace of mind with a reliable, rust-free HVAC system.

All Set Service provides dependable residential HVAC and appliance repair services across Orange County. This Huntington Beach heat pump repair is a prime example of our commitment to quality workmanship and customer satisfaction.

A commercial facility in Westminster, CA had a Carrier split-system heat pump that was struggling to maintain cooling. Our licensed HVAC service team responded quickly to diagnose this commercial heat pump repair issue and restore proper performance.

 

 

Diagnosing a Freon Leak in the Carrier System

Our certified HVAC technician performed a thorough inspection of the heat pump. We discovered a refrigerant leak, indicated by low pressure and frost on the evaporator lines. Using electronic leak detection, we pinpointed the source at the evaporator coil inside the air handler. A Freon leak in the coil severely reduces cooling and could damage the compressor, so an immediate repair was needed.

 

Evaporator Coil Replacement Under Warranty

The faulty evaporator coil needed replacement. Fortunately, the unit was still under Carrier’s manufacturer warranty, so the coil part was provided at no cost. Our team obtained the proper replacement coil and proceeded with the repair.

Step-by-Step Repair Process

• Refrigerant Recovery: Safely recovered the remaining refrigerant from the system using approved equipment.

• Coil Removal: Removed the old leaking evaporator coil from the indoor air handler.

• New Coil Installation: Installed the new Carrier evaporator coil, sealing all connections properly.

• System Evacuation: Evacuated the refrigerant lines with a vacuum pump to remove air and moisture.

• Recharge: Recharged the system with the correct type and amount of refrigerant (per manufacturer specifications).

• Testing: Tested for any leaks and verified the heat pump’s proper operation in cooling and heating modes.

   

Results and Professional Service

After the coil replacement and refrigerant recharge, the heat pump’s performance was fully restored, providing efficient cooling to the commercial space again. The repair was completed promptly to minimize downtime for the business.

Our client also benefited from the warranty coverage, saving on the cost of the new coil. All work was carried out by our licensed, insured HVAC company with certified technicians, ensuring the job met all safety and quality standards. We take pride in thorough diagnostics, step-by-step repairs, and supporting our customers with reliable, warranty-backed HVAC service in Westminster and the surrounding area.