Hoshizaki Ice Maker Filter, Reset Button, and Other Kitchen Questions I Get as an Office Buyer

I've been the office administrator and buyer here since 2020. That means I handle about 60–80 orders a year, manage relationships with 8 vendors, and report to both operations and finance. Somewhere along the way, I also became the unofficial person who knows why the ice maker is blinking.

When we upgraded our breakroom kitchen in 2024, I ended up researching Hoshizaki ice machines, water filters, reset buttons, the water heater, and even a kerosene heater for our satellite warehouse. These are the questions I actually kept asking—and the answers I wish someone had given me straight.

Questions I Actually Get

Does a Hoshizaki ice maker really need its own water filter?

For most commercial setups, yes. A Hoshizaki ice maker water filter isn't just a way to make money off accessories. It catches sediment, reduces scale, and helps prevent the tiny ice holes from clogging. We have a KM-151BAH with a line filter, and the difference in ice clarity and taste is noticeable.

If you already have a point-of-use water filtration system or very soft water, you might get by without a dedicated filter. But for an ice machine that runs all day, I'd budget for one. It's cheaper than a service call to descale the evaporator. Hoshizaki's maintenance manual recommends changing the filter at least every six months, or sooner if you have hard water. I don't have hard data on exactly how many ice machine problems are water-related, but in my experience, more than half of our early issues were.

Where is the reset button on a Hoshizaki ice machine?

This depends on the model, and that's not a dodge. Many Hoshizaki units use a control switch with ICE/OFF/CLEAN settings. Some have a red reset button on the control board behind the front panel. Others simply need to be unplugged for five minutes and plugged back in.

If your Hoshizaki ice machine reset button is easy to find, that doesn't mean you should hit it every time the machine stops. One reset after a power blip or water supply interruption? Fine. Multiple resets in a day? Something else is going on—often a clogged filter, low water pressure, or a failed part. The reset button is a diagnostic signal, not a long-term fix. If you can't find it, check the model schematic in the service manual. It saved me from guessing on our older KM unit.

Can I use a kerosene heater in a warehouse attached to our kitchen?

I get this because I also buy heating for our satellite location. Short answer: don't. A kerosene heater can put out fumes, carbon monoxide, and even bits of soot. If that air reaches an ice maker or food prep area, you're compromising the ice that people are going to drink. Commercial ice machines are food-contact equipment; unvented fuel-burning heaters don't belong in the building.

If you need temporary heat, use an electric heater or a properly vented unit, and keep it away from air intakes. I do not recommend using a kerosene heater indoors, period. I don't have hard data on how many facilities have ruined a batch of ice because of a garage heater. But the cost of one health department problem is way more than the cost of renting a nice electric space heater. My bottom line: don't risk it.

What temperature should a water heater be set to?

For an office kitchen, I keep ours at 120°F. That's high enough for comfort and low enough to reduce scalding risk. If you have a commercial dishwasher, it probably needs a 140°F to 160°F booster heater to sanitize properly. The water heater itself can stay at 120°F.

I used to think cranking the water heater higher was better. After five years of managing this building, I've come to believe that not resetting your expectations is the real problem. If the water heater reset button keeps tripping, that usually means a bad thermostat or heating element. Call a plumber—don't just reset it and forget it. This is different from a Hoshizaki ice machine, but they share one thing: repeated resets are never the actual fix.

How can I tell if something is freezer burned?

Look for grayish or white patches, dry leathery spots, and ice crystals that look like frost inside the packaging. Freezer-burned meat usually has a lighter color and shriveled edges. It's still safe to eat because freezer burn is dehydration, not spoilage. But it will taste dry and bland.

When I pulled a package of chicken breasts out of our breakroom freezer in 2021, I had no idea. I cooked it, and it came out like cardboard. That's when I learned to check for ice crystals and feel the texture. That's really how to tell if something is freezer burned: it looks dry and frosty, not just cold. If the whole package is covered in frost and smells off, throw it out. If it's just one patch, use it in a slow-cooked dish where texture matters less.

Is Hoshizaki overkill for a small office that only makes a few pounds of ice per day?

Honestly? Maybe not. Hoshizaki machines are workhorses, and I recommended one for our main kitchen because we use ice daily for catering. But if you're a small office with a countertop ice maker that empties twice a week, a full undercounter Hoshizaki is overkill. The upfront cost and maintenance don't make sense for 10 pounds a day.

The same logic applies to the water filter. I recommend it for any commercial Hoshizaki. But if you're using the occasional bagged ice and just need something to keep your afternoons cold, maybe save the money. There's no universal best. It depends on how much you need and whether you have someone like me to keep up with cleaning.

What's the one Hoshizaki maintenance habit you wish you had started sooner?

Regularly cleaning the air-cooled condenser. I know that's not the flashy answer. But dust and grease buildup makes the machine work harder, which leads to overheating and those little shutoffs that make you search for a reset button. I vacuum the condenser coils every few months. It takes ten minutes, and it's probably the reason our ice maker has been more reliable than the water heater.

I'd pair that with a real schedule for changing the Hoshizaki water filter. A sticky note on the filter works. Replace it every six months, not when the ice starts tasting funny. That's the kind of proactive thing I didn't understand when I started this job in 2020. Now I'm the person who writes the 'last replaced' date on the filter with a marker. It took a few years and more than one service call to get there.