A power outage is a short event that can leave a water system in a different state than it was before the lights went out. A softener clock may blink, a UV lamp may not restart, or a reverse osmosis unit may sit idle until someone notices the faucet is slow. The homeowner's question is which of those fixes is theirs and which should go to the installer or a licensed electrician.
Resets you can do yourself
Start with the manual or the label on the unit, not with memory. Most control heads have a set-time routine written out step by step. If a softener display is flashing, set the clock to the actual time of day, then confirm the regeneration hour is still the one you chose at install. Do not guess that hour. If you originally picked a quiet time such as early morning, put it back there, because a reset can leave the unit on a default that runs during showers or laundry.
Once power is back, check the indicator lights the manual describes. For a UV unit, look for the lamp indicator and give it the time the manual allows before you assume it is working. For a reverse osmosis system, let the storage tank refill and check the faucet for normal flow, then look under the sink for drips. If the display, lights, and flow all match the manual's normal readings, the reset is finished.
Signs the job has become a hire
Stop resetting and call for help if any of these happen:
An error code returns after one reset, or the unit keeps cycling between states.
A breaker trips again, or the outlet, plug, or cord is warm, discolored, or smells of burning. If you can switch the unit off at the wall safely, do so, then call a licensed electrician. Do not open the cabinet while there is water on the floor.
Water runs when it should not, a drip persists, or you notice a new smell or taste in the water.
The fix requires a tool or step beyond the manual's listed reset, such as opening a valve body, replacing a circuit board, or cutting pipe.
The outage came with a noticeable surge or flicker. Ask the installer to check the control board, the lamp, or the pump on the next visit, even if the unit seems to work.
Protect the warranty while you reset
The warranty is a contract, so read it for what happens if you open housings, change settings, or let someone outside the company service the unit. Some manuals list steps the owner may take and steps that need a certified technician. Follow that split. Keep a short note of what the display showed before the reset, what you changed, and what it showed afterward. The installer can work from those facts on a visit instead of starting from a guess.
Set yourself up before the next outage
Keep the manual with the unit, or photograph the reset page with your phone. Find the breaker or switch that powers the unit and note whether it shares a circuit with a pump or water heater. At the next routine visit, ask the installer to walk you through the reset step and to tell you exactly what they want called in. That answer belongs to the company that installed the equipment and the warranty behind it, so it is worth getting in person and in writing.