Daikin is a well-known air conditioning brand praised for its energy efficiency and quiet operation. But despite its reputation, many users experience recurring issues that turn their investment into a headache. Here’s what people are reporting—and some practical guidance if you’ve had similar trouble.
1. Poor Cooling or Heating and Gas Leaks
Several users say their Daikin units barely cool a room even right after installation. Some report rapid drop in performance after just days or weeks of use. In extreme heat, cooling efficiency drops noticeably.
Recurring refrigerant leaks are another common complaint—and often go undiagnosed or poorly fixed, despite multiple service visits and ongoing expense.
2. Frequent Board or Electronics Failure
Many customers across regions have reported control boards (indoor or outdoor, and CoreSense modules) failing multiple times—sometimes as early as 12 months in. With each failure, replacements and repair waits add up.
In several threads, users described waiting weeks or months for parts and follow‑up, even on units still under warranty.
3. Terrible Customer Service & Warranty Support
Service delays, poor communication, and claims of “no engineers available” are widespread. Many say they called repeatedly with no clear answer or resolution—even for urgent issues like no cooling in extreme heat.
Some report being told their warranty was voided over installation choices or paperwork errors they didn’t control.
4. Installation Quality Issues
Blaming installation practices like skipping vacuuming the refrigerant line, improper sizing, or letting in condensation has been common. Even buyers with supposedly certified installers reported big issues like gas leaking or system malfunction shortly after setup.
“One local installer claimed compressor needed replacement, but independent tech later found only a gas leak and simple rewiring issue,” a user shared.
5. Software Glitches and Accuracy Problems
Some Daikin models reportedly ignore set temperature and continue heating past the target. One user noted:
“I set 19.5 °C, the unit heated to 22 °C—and kept blowing hot air anyway.”
Others say certain models switch to fan mode but blow high‑humidity air at the end of cycles—making the room feel warmer and damper.
6. Humid, Mold-Prone Dry Function
In “dry” or dehumidifying mode, some units cycle in a way that raise indoor humidity intermittently, causing discomfort or encouraging mold growth. One user reported
“Fan kicked in after reaching set temp, raising room humidity from ~50 % to ~75 %. Very uncomfortable—even with dry mode on.”
User Sample Complaints (Real Voices)
- “We had three motherboard replacements and a fan failure in under three years—parts always delayed.”
- “Multiple technicians misdiagnosed leaks as compressor failure; suggested replacing entire unit.”
- “Service requests were canceled or ignored repeatedly—even for a unit installed just months ago.”
- “Touch controls go into timer-loop mode and buttons fail to respond consistently.”
Major Themes Across Complaints
- Recurring part failures: compressors, boards, sensors, CoreSense modules.
- Poor service and warranty experience: long delays, unhelpful reps, denied coverage.
- Installation errors: missing vacuum, wrong sizing, improper line set handling.
- Control and software bugs: temperature overshoot, humidity cycles, remote glitches.
What You Can Do if You’re Facing Problems
- Document every issue—dates, symptoms, technician names, report numbers.
- If cooling or heating fails soon after install, demand re‑evaluation of refrigerant leaks and airflow.
- Push for diagnostics on control boards and CoreSense logic if short cycling or error loops persist.
- If waiting too long for parts, consider escalating via consumer protection agencies or arbitration.
- For poor installation, bring in an independent HVAC pro to inspect vacuum seals, line sets, and sizing.
- Regular cleaning of filters and coils helps—but doesn’t fix core hardware or software issues.
When to Walk Away or Seek Alternatives
If you’re repeatedly dealing with board failures, refrigeration leaks, or stonewalling support—especially while other HVAC brands like Mitsubishi or Panasonic offer better responsiveness—it might be time to reconsider product choice.
Several users reported:
“Will switch to Mitsubishi—in my experience it’s more reliable and parts are easier to get.”
Summary Table: Complaints vs. Common Causes
| Complaint | Underlying Cause |
|---|---|
| Loss of cooling/heating | Refrigerant leaks, poor airflow, installation errors |
| Repeated control board failure | Voltage surges, CoreSense logic issues, poor soldering |
| Idle or erratic fan at end of cycle | Software/design behavior, sensor bugs |
| Installation delays or refusal | Poor dealer networks, unclear warranty policies |
| Remote stuck in timer loop | Firmware bug or stray sensor input |
Final Thoughts
Daikin offers premium features and efficiency on paper—but these reports show that reliability, service, and installation are inconsistent. If you’re considering a Daikin system, vet the installer, confirm warranty terms, and document early problems closely.
When issues arise, persistence, escalation, and knowing your rights are crucial. And remember: a polite but firm conversation with technicians or consumer forums may get results faster than waiting in silence.