8 HVAC jobs completed in Concord since July 2023.
A Daikin U4 error and a blown fuse
The smaller of two Daikin systems stopped running and displayed U4. The first inspection found a blown 3.15 amp slow-blow fuse in the outdoor RXB18AXVJU. We replaced the outdoor fan motor, then testing pointed to the main control board. A return visit completed the board replacement. The outdoor unit now has a replacement fan motor and control board.
Rebuilding both Gree flare connections
We recovered the existing refrigerant and rebuilt both outdoor-unit flare connections with new flare nuts. The system was pressure-tested with nitrogen, evacuated and recharged with 9.3 lb of R-410A. We also cleaned the outdoor coil. A performance check and reassembly finished the recorded work.
Use Project Pal before choosing a permit
Concord offers Project Pal to check zoning, identify required permits and estimate permit fees. The separate Permit Portal handles applications, application status, inspection status and permit-history searches. Those tools answer the City side of a project before an equipment installation is scheduled.
City of Concord Permit Center · checked October 28, 2026
Arrange service
Services in Concord
Find your equipment brand in Concord
Neighboring cities we also serve
Walnut Creek · Martinez .
Schedule HVAC service in Concord
Concord, CA · 7am–7pm · 7 days · no overtime charges