Daikin service in San Mateo County
Daikin heat pump or mini-split? We work on them.
Daikin heat pumps and ductless mini-splits in homes, and Daikin VRV in commercial buildings, across San Mateo and Santa Clara counties. Here is what goes wrong with them, a recall to check, and what we do.
Which Daikin systems do you work on?
Daikin ductless and multi-zone mini-splits, ducted heat pumps and air conditioners in homes, and Daikin VRV systems in commercial buildings.
We repair and maintain them, and when one is past fixing we replace it.
Common Daikin problems, and what we do
What owners notice, what it usually means, and how we handle it. If it smells of gas, leave the house and call your gas utility from outside.
| What you notice | What it usually means | What we do |
|---|---|---|
| Water dripping from the indoor unit | A clogged drain line, a drain line that runs uphill, or a failed condensate pump. | We clear and flush the drain, check its slope all the way out and replace a failed pump. |
| Lights blinking or a code on the indoor unit | The unit is reporting a fault. What it means depends on the model. | Note the pattern or code and the model number on the label, and tell us when you call. |
| Not cooling or heating like it used to | Dirty filters or coil, low refrigerant from a leak at a flare joint, or a fan problem. | We clean, test and leak check, and fix the leak before we recharge. |
| Heat stops for a few minutes on a cold morning | Usually the defrost cycle melting frost off the outdoor unit. It is normal. | Nothing, if the heat comes back. Call if the outdoor unit keeps icing up. |
| A musty smell when it starts | Dirt and mold growing on the indoor coil and blower wheel. | A deep clean of the indoor coil, the blower wheel and the drain pan. |
| The remote does nothing | Usually flat batteries, or something between the remote and the unit. | Try new batteries first. If it still won't respond, we find out whether the remote or the unit is at fault. |
Is your Daikin system down?
Call, or book a visit online. Have the model number from the label ready if you can.
What to check before you call
A few things worth a minute before you book. If none of them fixes it, call.
- The thermostat or remote is on the right mode (Cool or Heat, not Fan) and set past the room temperature.
- The breaker for the system is on, and so is the switch beside the outdoor unit.
- The filter is clean. A clogged one can stop the cooling and freeze the coil.
- The outdoor unit is clear of leaves, plants and anything stacked against it.
- The model and serial number label is photographed: it is on the side of the outdoor unit and inside the furnace or air handler door.
Is my Daikin FIT heat pump recalled?
Some may be. The U.S. Consumer Product Safety Commission posted the recall on June 27, 2024. It covers Daikin FIT heat pumps (with Amana S-series and Goodman SD units): after a power interruption, the heat pump can supply heat when power returns even with the thermostat set to cooling. The remedy is a repair.
The model name is printed on the outside of the unit. Check your model against the list on the recall notice, and follow its steps.
Source: U.S. Consumer Product Safety Commission, recall notice. Rules and programs change: last checked 2026-10-22.
Should I register my Daikin system?
Daikin's terms depend on the model, and its registration rules differ by state. They are in the papers that came with the system and on Daikin's website. If your system is new, check them now; we can find the model and serial numbers for you.
Can you work on a Daikin system someone else installed?
Yes. Who put it in doesn't matter for a repair. We work from the model and serial number on the label.
Who will be working on my system?
AD Mechanical Services Inc., owned by Adlan Cherkesbiev, under CSLB license #1155755, C-20 Warm-Air Heating, Ventilating and Air-Conditioning. We aren't connected with Daikin; we're the local contractor who works on it.
Tell us what it's doing. We'll take it from there.
Call and describe the problem: the noise, the smell, the room that never warms up. Or book a visit online.
