True 800345 OEM Temperature Control Thermostat

True 800345 OEM Temperature Control Thermostat

The True 800345 Temperature Control is a genuine OEM thermostat designed for compatible True Manufacturing commercial refrigerators and freezers. This mechanical temperature control works within the refrigeration control circuit to respond to cabinet temperature and cycle the applicable refrigeration system according to the equipment's operating requirements.

Reliable temperature-control operation is critical in commercial refrigeration. A thermostat that no longer senses or switches correctly can contribute to warm cabinet temperatures, excessive cooling, abnormal compressor cycling, extended run times, short cycling, or equipment that does not respond correctly to temperature adjustments.

When qualified diagnosis confirms temperature-control failure, replacing the original component with the correct True OEM 800345 helps restore the temperature-control configuration intended for compatible True commercial refrigeration equipment.

OEM Part Details

• Manufacturer: True Manufacturing
• OEM Part Number: 800345
• MPN: 800345
• Part Type: Temperature Control / Thermostat
• Application: Commercial Refrigeration Equipment
• Function: Cabinet Temperature Regulation

What the True 800345 Temperature Control Does

The True 800345 thermostat operates as part of the equipment's refrigeration control system. As temperature changes at the sensing location, the thermostat responds through its sensing system and changes the state of the connected refrigeration control circuit.

Proper temperature-control operation helps support:

• Consistent refrigerated cabinet temperatures
• Proper refrigeration cycling
• Reliable response to temperature changes
• Normal compressor cycling
• Temperature recovery after door openings
• Reduced excessive temperature fluctuations
• Dependable commercial refrigeration performance

Compatible True Models

The True 800345 OEM Temperature Control is listed for compatible True commercial refrigeration equipment including:

• GDM23F
• GDM23FRC
• GDM26F
• GDM49DT
• GDM49F
• GDM49FRC
• GDM72F
• GDM7F
• T12F
• T19F
• T23DT
• T23F
• T23FG
• T35F
• T36GC
• T49DT
• T49DT4
• T49F
• T49FG
• T72F
• TA1F1S
• TA1F2HS
• TG1F1S
• TG2DT2S
• TG2F2S
• TM74F
• TR1F1S
• TR2F2S
• TR3F1F
• TR3F3S
• TS49F
• TS49FG
• TS72F
• TUC27F
• TUC27FD2
• TUC48FD4
• TWT27F
• TWT48F
• TWT60F

Compatibility Note: True equipment can vary by serial number, production date, voltage, thermostat configuration, sensing arrangement, and factory revision. Always verify OEM part number 800345, the complete equipment model and serial number, and the original temperature control before ordering.

Common Signs of a Failing Temperature Control

Qualified commercial refrigeration technicians may inspect the True 800345 when troubleshooting conditions such as:

• Cabinet temperature runs warmer than intended
• Cabinet becomes excessively cold
• Compressor does not cycle off normally
• Compressor does not start when cabinet temperature rises
• Refrigeration cycles too frequently
• Compressor runs for unusually long periods
• Large cabinet-temperature fluctuations
• Temperature adjustment produces little or no response
• Intermittent refrigeration operation
• Thermostat operates inconsistently
• Damaged sensing bulb or capillary
• Loose or damaged thermostat terminals
• Burned or overheated electrical connections

These symptoms do not automatically confirm thermostat failure. Refrigerant-system problems, compressor issues, relays, wiring, evaporator fans, condenser restrictions, airflow problems, door gaskets, defrost components, and other refrigeration controls can produce similar symptoms. Proper diagnosis should be completed before replacing the thermostat.

Sensing Bulb & Capillary Inspection

The sensing system is critical to proper mechanical thermostat operation. The True 800345 depends on its sensing arrangement to respond correctly as equipment temperature changes.

Technicians should inspect for:

• Kinked capillary tubing
• Crushed or flattened capillary sections
• Sharp bends
• Damaged sensing bulb
• Incorrect sensing-bulb placement
• Loose sensing-bulb mounting
• Physical damage from previous service
• Capillary routing that differs from the original installation

A damaged sensing assembly can affect thermostat response. The sensing bulb and capillary should not be cut, crushed, sharply bent, kinked, or otherwise modified.

Technician Checks Before Ordering

Before replacing the True 800345 temperature control, qualified commercial refrigeration technicians should verify:

• OEM part number 800345
• Complete True equipment model
• Equipment serial number
• Original thermostat identification
• Equipment electrical requirements
• Thermostat terminal arrangement
• Mounting configuration
• Control knob and shaft arrangement
• Sensing-bulb condition
• Capillary condition and routing
• Associated wiring and connectors
• Compressor-control circuit operation
• Refrigeration-system condition
• Signs of overheated or damaged terminals

OEM part-number verification should be the primary method of selecting the replacement. Commercial refrigeration thermostats that look similar can have different temperature ranges, electrical ratings, capillary lengths, sensing configurations, terminal arrangements, and equipment applications.

Diagnosing a True Refrigerator or Freezer That Runs Warm

A True refrigerator or freezer that is running warm does not automatically have a failed 800345 temperature control. The thermostat should be evaluated as part of the complete refrigeration system.

Depending on the equipment configuration, technicians may need to inspect:

• Actual cabinet temperature
• Thermostat response
• Compressor operation
• Evaporator fan operation
• Condenser fan operation
• Condenser cleanliness and airflow
• Refrigerant-system performance
• Evaporator frost pattern
• Door gasket condition
• Cabinet airflow
• Defrost-system operation where applicable
• Electrical wiring and connections

Testing the complete refrigeration system helps prevent unnecessary thermostat replacement when another component or system condition is responsible for the temperature problem.

Diagnosing a Cabinet That Runs Too Cold

A thermostat that does not interrupt the refrigeration control circuit correctly can contribute to excessive cooling or unusually long compressor operation. Other electrical and refrigeration conditions can produce similar symptoms.

Technicians may need to evaluate:

• Thermostat switching operation
• Sensing-bulb placement
• Capillary condition
• Control wiring
• Associated relay operation where applicable
• Actual cabinet temperature
• Temperature-control setting

Correct diagnosis helps determine whether the True 800345 itself has failed or whether another component is keeping the refrigeration system operating longer than intended.

Diagnosing Short Cycling

Short cycling occurs when the refrigeration system starts and stops more frequently than expected. A temperature-control problem can contribute to short cycling, but it is only one possible cause.

Technicians should also consider:

• Sensing-bulb placement
• Loose electrical connections
• Relay or contactor condition where applicable
• Compressor overload operation
• Condenser airflow
• Refrigerant-system conditions
• Cabinet load
• Airflow through the refrigerated compartment

Identifying the actual cause of short cycling helps avoid replacing a functional temperature control unnecessarily.

Inspect Wiring & Connections

When replacing a failed or heat-damaged thermostat, inspect the connected wiring and terminals carefully.

Look for:

• Loose electrical terminals
• Burned connectors
• Discolored terminal ends
• Melted insulation
• Corrosion
• Loose crimps
• Damaged wiring
• Evidence of electrical arcing

A poor electrical connection can create heat and damage a replacement temperature control if the underlying connection problem is not corrected.

Commercial Refrigeration Applications

Compatible True equipment using the 800345 temperature control is designed for demanding commercial refrigeration environments including:

• Restaurants
• Commercial kitchens
• Convenience stores
• Supermarkets
• Bars and beverage-service operations
• Hotels
• Schools
• Hospitals
• Universities
• Institutional kitchens
• Corporate cafeterias
• Catering operations
• Foodservice facilities

Installation & Service Notes

Disconnect electrical power and follow True Manufacturing service procedures before servicing commercial refrigeration equipment.

Before removing the original 800345 temperature control, document the electrical connections, mounting position, control-knob arrangement, capillary routing, and sensing-bulb location.

Compare the replacement thermostat with the original component before installation. Carefully route the capillary according to the original equipment configuration. Do not sharply bend, kink, crush, cut, or otherwise damage the sensing system.

Inspect wiring, terminals, connectors, and associated refrigeration controls for overheating, corrosion, looseness, or other damage before installing the replacement.

After installation, operate the equipment through an appropriate refrigeration cycle and verify normal compressor cycling, temperature response, cabinet pull-down, and final operating temperature.

Commercial refrigeration temperature controls should be diagnosed and installed by qualified refrigeration service personnel.

Why Correct OEM Temperature Control Identification Matters

Commercial refrigeration thermostats can appear nearly identical while having different temperature ranges, electrical ratings, capillary lengths, sensing-bulb configurations, terminal layouts, and equipment applications.

Using True OEM part number 800345 as the primary identification reference helps technicians and purchasing departments select the correct replacement rather than relying solely on physical appearance.

Always verify the complete equipment model, serial number, original thermostat, electrical requirements, sensing arrangement, and terminal configuration before ordering.

Frequently Asked Questions

What is the True 800345?

The True 800345 is an OEM temperature control thermostat used in compatible True Manufacturing commercial refrigerators and freezers.

Which True models use the 800345 temperature control?

The True 800345 is listed for compatible GDM23F, GDM23FRC, GDM26F, GDM49DT, GDM49F, GDM49FRC, GDM72F, GDM7F, T12F, T19F, T23DT, T23F, T23FG, T35F, T36GC, T49DT, T49DT4, T49F, T49FG, T72F, TA1F1S, TA1F2HS, TG1F1S, TG2DT2S, TG2F2S, TM74F, TR1F1S, TR2F2S, TR3F1F, TR3F3S, TS49F, TS49FG, TS72F, TUC27F, TUC27FD2, TUC48FD4, TWT27F, TWT48F, and TWT60F.

Does True 800345 fit GDM freezers?

It is listed for several compatible GDM configurations including GDM23F, GDM23FRC, GDM26F, GDM49F, GDM49FRC, GDM72F, and GDM7F. Verify the complete model and serial number before ordering.

Does True 800345 fit T49F equipment?

It is listed for compatible T49F and T49FG equipment as well as related T49DT and T49DT4 configurations shown in the fitment list. Confirm the serial number and original thermostat before replacement.

Does 800345 fit True TUC equipment?

It is listed for compatible TUC27F, TUC27FD2, and TUC48FD4 equipment. Verify the complete model, serial number, and original temperature control before ordering.

Does True 800345 fit TWT equipment?

It is listed for compatible TWT27F, TWT48F, and TWT60F equipment. Confirm the equipment identification and original thermostat before replacement.

Can a bad True 800345 thermostat cause a refrigerator to run warm?

Yes. A temperature control that does not call for refrigeration correctly can contribute to elevated cabinet temperature. Compressor operation, airflow, fan motors, refrigerant-system performance, defrost operation, and other controls should also be inspected.

Can a failed thermostat cause the compressor to run continuously?

A thermostat that does not interrupt the refrigeration circuit correctly can contribute to continuous compressor operation, but other refrigeration and electrical problems can create the same symptom.

Can a damaged capillary cause temperature-control problems?

Yes. A kinked, crushed, cut, or otherwise damaged capillary can prevent a mechanical thermostat from responding correctly to temperature changes.

Why does my True freezer short cycle?

Short cycling can result from temperature-control problems, sensing issues, electrical connections, compressor overload conditions, condenser airflow problems, or other refrigeration-system faults. The complete system should be evaluated.

How do I confirm True 800345 is the correct replacement?

Verify OEM part number 800345, the complete True equipment model and serial number, and compare the original thermostat's terminals, mounting configuration, sensing bulb, capillary routing, and electrical requirements before ordering.

Is professional installation recommended?

Yes. Commercial refrigeration temperature controls operate within electrical and refrigeration control systems and should be diagnosed and installed by qualified refrigeration service personnel.

Why Buy From Parts Direct Online?

Parts Direct Online supplies OEM commercial refrigeration and commercial cooking replacement parts for service technicians, contractors, restaurants, supermarkets, 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.