Hoshizaki SP-5677 OEM Thermostat with Bulb Holder

Hoshizaki SP-5677 OEM Thermostat with Bulb Holder

The Hoshizaki SP-5677 Thermostat with Bulb Holder is an OEM temperature-control component designed for compatible Hoshizaki commercial ice machines. The thermostat uses its sensing bulb arrangement to respond to temperature conditions and provide the switching response required by the applicable equipment control circuit.

Accurate temperature sensing is important to dependable commercial ice-machine operation. A thermostat that is damaged, electrically worn, incorrectly positioned, affected by sensing-bulb problems, or no longer switching consistently can contribute to abnormal equipment sequencing, temperature-control concerns, or inconsistent machine operation.

When qualified diagnosis confirms thermostat replacement is required, using the correct Hoshizaki OEM SP-5677 helps restore the temperature-control and sensing configuration intended for compatible Hoshizaki equipment.

OEM Part Details

• Manufacturer: Hoshizaki
• OEM Part Number: SP-5677
• MPN: SP-5677
• SKU: SP-5677
• Part Type: Thermostat with Bulb Holder
• Application: Commercial Ice Machines
• System: Temperature-Control Circuit
• Function: Temperature Sensing & Electrical Control

Compatible Hoshizaki Models

The Hoshizaki SP-5677 OEM Thermostat with Bulb Holder is listed for compatible Hoshizaki commercial ice-machine equipment including:

• B-500PF
• B-700PF
• F-1002MAJ
• KM-1100MAH
• KM-1100MAJ
• KM-1100MAJ50
• KM-1100MRH
• KM-1100MRJ
• KM-1100MWH
• KM-1100MWJ
• KM-1200SAE
• KM-1200SRE
• KM-1200SWE
• KM-1300MAH
• KM-1301SAH
• KM-1301SAH3
• KM-1301SRH
• KM-1301SRH3
• KM-1301SRJ-E
• KM-1301SWH
• KM-1301SWH-P
• KM-1301SWH3
• KM-1340MAH
• KM-1340MAJ
• KM-1340MRH
• KM-1340MRH3
• KM-1340MRJ
• KM-1340MRJ3
• KM-1340MWH
• KM-1340MWJ
• KM-1400SWH-M
• KM-1400SWH3-M
• KM-1600
• KM-1600SRH
• KM-1600SRH3
• KM-1600SWH
• KM-1600SWH3
• KM-1601MRH
• KM-1601MRH3
• KM-1601MRJ
• KM-1601MRJ3
• KM-1601SAH
• KM-1601SAH3
• KM-1601SRH
• KM-1601SRH3
• KM-1601SWH
• KM-1601SWH3
• KM-1800SAH3
• KM-1900SAH
• KM-1900SAH-P
• KM-1900SAH3
• KM-1900SRH
• KM-1900SRH3
• KM-1900SWH

Compatibility Note: Hoshizaki equipment can vary by serial number, auxiliary code, production date, and factory configuration. Always verify OEM part number SP-5677, the complete equipment model, serial number, auxiliary code where applicable, original thermostat, sensing-bulb arrangement, bulb holder, terminals, and mounting configuration before ordering.

What the Hoshizaki SP-5677 Thermostat Does

The Hoshizaki SP-5677 thermostat responds to temperature through its sensing-bulb system. Temperature changes at the bulb cause the thermostat to change the state of the applicable electrical control circuit according to the equipment design.

Proper thermostat operation helps support:

• Reliable temperature sensing
• Consistent control response
• Proper machine sequencing
• Stable operation of the applicable control circuit
• Reliable response to changing temperature conditions
• Dependable commercial ice-machine operation

Why the Bulb Holder Matters

The sensing bulb must remain in the intended position to respond correctly to temperature conditions. The bulb holder helps maintain the original sensing location and relationship required by the equipment.

A thermostat can appear defective when the actual problem involves:

• Incorrect sensing-bulb position
• Loose bulb holder
• Damaged holder
• Sensing bulb no longer secured correctly
• Physical damage to the sensing assembly
• Incorrect capillary routing

For this reason, the thermostat, sensing bulb, bulb holder, capillary routing, and mounting arrangement should be inspected together during service.

Common Signs of a Thermostat or Sensing Problem

Qualified commercial ice-machine technicians may inspect the Hoshizaki SP-5677 when troubleshooting conditions such as:

• Temperature-related control response is inconsistent
• Equipment does not respond normally to changing temperature
• Thermostat does not switch when expected
• Control circuit operates intermittently
• Temperature-related machine sequence is abnormal
• Thermostat terminals show signs of overheating
• Electrical connections are loose or damaged
• Sensing bulb is loose or displaced
• Bulb holder is damaged
• Capillary tubing is kinked, crushed, or damaged
• Thermostat mounting is loose
• Physical damage is visible on the control

These symptoms do not automatically confirm thermostat failure. Wiring, connectors, other controls, water-system conditions, refrigeration performance, sensing-bulb placement, and machine-control components can produce similar symptoms. The complete system should be diagnosed before replacing the thermostat.

Sensing Bulb & Capillary Inspection

The sensing bulb and capillary are critical parts of a mechanical thermostat. Damage to the sensing system can interfere with normal temperature response even if the thermostat body appears undamaged.

Technicians should inspect for:

• Kinked capillary tubing
• Crushed capillary sections
• Sharp bends
• Damaged sensing bulb
• Incorrect bulb location
• Loose bulb holder
• Incorrect capillary routing
• Physical damage caused during previous service

The sensing bulb and capillary should not be cut, crushed, sharply bent, kinked, or otherwise modified.

Thermostat vs. Sensing-Bulb Position

An incorrectly positioned sensing bulb can produce temperature-control symptoms even when the thermostat itself is electrically functional.

Before replacing SP-5677, technicians should verify:

• Original sensing location
• Bulb-holder position
• Secure bulb mounting
• Correct capillary routing
• Clearance from unrelated components
• Condition of the holder and mounting hardware

Restoring the original bulb position may correct a sensing problem without replacing a functional thermostat.

Inspect Electrical Terminals & Wiring

A damaged connection can create intermittent control operation and may resemble thermostat failure.

Inspect for:

• Loose terminals
• Burned or discolored connectors
• Corrosion
• Heat-damaged wiring
• Broken conductors
• Loose crimps
• Damaged insulation
• Evidence of electrical arcing

Damaged connections should be corrected before the replacement thermostat is energized.

Technician Checks Before Ordering

Before replacing the Hoshizaki SP-5677 thermostat with bulb holder, verify:

• OEM part number SP-5677
• Complete Hoshizaki machine model
• Equipment serial number
• Auxiliary code where applicable
• Original thermostat identification
• Sensing-bulb configuration
• Bulb-holder configuration
• Capillary routing
• Thermostat mounting arrangement
• Terminal configuration
• Electrical wiring
• Control-circuit relationship
• Condition of related temperature-control components

OEM part-number verification should be the primary identification method. Mechanical thermostats can look very similar while having different operating characteristics, capillary lengths, bulb configurations, terminal layouts, mounting arrangements, and equipment applications.

Diagnosing Intermittent Thermostat Operation

An intermittent temperature-control problem can originate from the thermostat, sensing system, wiring, connectors, or another control component.

Qualified technicians may need to evaluate:

• Thermostat switching response
• Terminal condition
• Electrical continuity
• Sensing-bulb position
• Capillary condition
• Wire connections
• Equipment operating conditions
• Related control components

Testing the complete circuit helps prevent unnecessary thermostat replacement when another component or connection is responsible for the condition.

Commercial Ice Machine Applications

Compatible Hoshizaki equipment using the SP-5677 thermostat is used in demanding commercial foodservice environments including:

• Restaurants
• Bars
• Hotels
• Supermarkets
• Convenience stores
• Schools
• Hospitals
• Universities
• Institutional kitchens
• Corporate cafeterias
• Catering operations
• Commercial foodservice facilities

Installation & Service Notes

Disconnect electrical power and follow applicable Hoshizaki service procedures before servicing commercial ice-making equipment.

Before removing the original SP-5677 thermostat, document the electrical connections, mounting position, capillary routing, sensing-bulb position, and bulb-holder arrangement.

Compare the replacement component with the original before installation. Carefully position the sensing bulb and holder according to the original equipment configuration.

Do not sharply bend, kink, crush, cut, or otherwise damage the sensing capillary.

After installation, restore the equipment to operation and verify the applicable temperature-control response and machine sequence.

Confirm that:

• The thermostat remains securely mounted
• The sensing bulb is secured in the intended location
• The bulb holder is properly positioned
• Capillary routing matches the intended configuration
• Electrical connections remain secure
• The thermostat responds consistently
• The machine progresses normally through its operating sequence

Commercial ice-machine temperature controls should be diagnosed and installed by qualified foodservice-equipment service personnel.

Why Correct Hoshizaki OEM Thermostat Identification Matters

Commercial ice-machine thermostats can appear nearly identical while having different temperature characteristics, sensing bulbs, capillary lengths, bulb holders, electrical terminals, mounting arrangements, and equipment applications.

Using Hoshizaki OEM part number SP-5677 together with the verified model fitment and original bulb-holder configuration provides technicians and purchasing departments with strong identification points when comparing the replacement with the original component.

Always verify the complete equipment model, serial number, auxiliary code where applicable, original thermostat, sensing bulb, holder, capillary routing, and electrical configuration before ordering.

Frequently Asked Questions

What is Hoshizaki SP-5677?

Hoshizaki SP-5677 is an OEM thermostat with bulb holder used in compatible Hoshizaki commercial ice-machine equipment.

Which Hoshizaki models use the SP-5677 thermostat?

SP-5677 is listed for compatible B-500, B-700, F-1002, KM-1100, KM-1200, KM-1300, KM-1301, KM-1340, KM-1400, KM-1600, KM-1601, KM-1800, and KM-1900 configurations, including all specific models listed above.

Does Hoshizaki SP-5677 fit KM-1100 equipment?

It is listed for compatible KM-1100MAH, KM-1100MAJ, KM-1100MAJ50, KM-1100MRH, KM-1100MRJ, KM-1100MWH, and KM-1100MWJ equipment.

Does SP-5677 fit Hoshizaki KM-1200 ice machines?

It is listed for compatible KM-1200SAE, KM-1200SRE, and KM-1200SWE equipment.

Does Hoshizaki SP-5677 fit KM-1301 equipment?

It is listed for multiple compatible KM-1301 configurations including SAH, SRH, SRJ, and SWH variants shown in the complete model list above.

Does Hoshizaki SP-5677 fit KM-1340 ice machines?

It is listed for compatible KM-1340MAH, KM-1340MAJ, KM-1340MRH, KM-1340MRH3, KM-1340MRJ, KM-1340MRJ3, KM-1340MWH, and KM-1340MWJ equipment.

Does SP-5677 fit Hoshizaki KM-1600 and KM-1601 equipment?

It is listed for numerous compatible KM-1600 and KM-1601 configurations shown in the complete fitment list above. Verify the complete model, serial number, and auxiliary code before ordering.

What does the bulb holder do?

The bulb holder helps maintain the thermostat sensing bulb in the intended position so it can respond correctly to equipment temperature conditions.

Can a loose sensing bulb make the thermostat appear defective?

Yes. Incorrect sensing-bulb position can affect thermostat response even when the electrical control itself remains functional.

Can a kinked capillary damage the thermostat?

Yes. The sensing capillary should not be sharply bent, kinked, crushed, cut, or otherwise damaged.

How do I confirm Hoshizaki SP-5677 is the correct replacement?

Verify OEM part number SP-5677, the complete Hoshizaki model, serial number, auxiliary code where applicable, original thermostat, bulb holder, sensing-bulb arrangement, capillary routing, mounting, and terminal configuration before ordering.

Is professional installation recommended?

Yes. Commercial ice-machine temperature controls should be diagnosed and installed by qualified foodservice-equipment service personnel.

Why Buy From Parts Direct Online?

Parts Direct Online supplies OEM commercial ice-machine, refrigeration, and cooking replacement parts for service technicians, contractors, restaurants, hotels, supermarkets, convenience stores, schools, hospitals, institutional kitchens, and foodservice facilities throughout the United States. Our focus is helping commercial equipment professionals identify the correct OEM replacement component and minimize costly equipment downtime.

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