Why is my Hoshizaki Ice Machine Beeping: Troubleshooting Single Beep Alarms

What do you do if you find your Hoshizaki ice machine beeping instead of producing ice? If you are an Easy Ice Subscriber – the answer is simple. Call us at 866-easyice and we will take care of it! :) 

If it is up to you to figure it out, here is our experience with Hoshizaki single beep alarms: 

Technically-speaking, Single beep alarms are the result of the thermistor reaching 127 degrees Fahrenheit. 

The most likely causes are: 

  • Hot water entering the ice machine 
  • Water not reaching the ice machine 
  • Issues with the hot gas valve 

Hot Water Issues 

95 percent of the time hot water entering the machine causes a 1 beep alarm. 

Hot water can enter your ice machine a few ways, but some are more common than others. 

One possibility is the cold water line is being heated up by an outside source. This causes the water entering your machine to run hot. 

Most water lines run underground to insulate it from heat, but in some instances, they run through walls or the roof. If these lines run past appliances that give off heat, like furnaces or ovens, they can heat the water. In warmer climates, heat from outdoors can also cause water to run hot.  

One of the most difficult problems to diagnose is hot water migration. This happens when hot water makes its way into cold water lines and flows to appliances like your ice machine.   

One common source of water migration are sinks equipped with pre-rinse sprayers or faucets. These sinks have both hot and cold water rushing to them. If not properly shut off at closing time, they leave an open line for pressurized hot water to push its way into the cold water line. Overnight, the ice machine pulls in the hot water and raises the temperature enough to trip the alarm. 

Other issues can cause water migration. A few common causes are: 

  • Faulty plumbing setups 
  • Mixing valves that combine hot and cold water 
  • Neighboring units in interconnected locations (e.g. Malls, hotels, apartment complexes, etc.) 

No Water 

Single beep alarm can also happen when water is not getting to the machine.  

Often, this is a result of the water being turned off from: 

  • Planned interruptions by the city for construction, infrastructure improvements, etc. 
  • Emergency interruptions by the city for repairs 
  • Missed water payments 
  • The water main is accidentally shut off by a plumber or an employee 

If you determine your water main was not accidentally shut off, you may have to contact your city to see if they planned an interruption. 

Equipment failure or damage to a water main could also restrict water flow to your machine. Some causes include: 

  • Faulty water valves 
  • Cracked water mains from fluctuating temperatures or ground moisture 
  • Corrosion in older water mains made of cast iron 
  • Accidental breaks from digging or construction 

Check the premises to rule out damage or a call to a plumber to diagnose the problem.  

Hot Gas Valve 

Hot gas valve issues are difficult to diagnose because it is inside the ice machine. The hot gas valve is a pumps hot gas into the evaporator to loosen ice for harvesting. In extremely rare cases, this valve sticks open and continually pumps hot gas into the evaporator until the thermistor reaches 127 degrees – shutting off the ice machine with the single beep alarm.  

In the tens of thousands of machines Easy Ice has repaired, we have only come across this issue one time – but it can happen.    

Additional Information 

Remember, the point of the ice machine beeping is to protect the ice machine from serious damage. The good news is you can reset a single beep alarm quickly without causing damage to the machine. Hot water migration is typically an intermittent problem. It may take a few times of tripping the alarm before you can track down the problem. 

Stick to the troubleshooting process so you can rule out the most likely problems…leaving you with that one-in-a-million story we would all like to tell! 

Have more questions about Hoshizaki commercial ice machines or how our ice maker repair subscription program works? You will find your answers here. Until next time…stay cool! 

Your Friendly Neighborhood Iceologists