Copeland 998-0071-02 Discharge Line Thermostat

The Copeland 998-0071-02 Discharge Line Thermostat is an OEM temperature-sensing thermostat that mounts on the compressor discharge line to monitor discharge gas temperature as part of Copeland's discharge temperature protection strategy. It works alongside a DTC (Discharge Temperature Control) valve or similar injection hardware, closing the loop between sensed temperature and the compressor's liquid-injection cooling response — without a functioning discharge line thermostat, injection valves have no accurate signal for when to open.

This part is a direct-replacement OEM thermostat for technicians servicing or troubleshooting an existing discharge temperature control system rather than installing a full kit from scratch. A failed or drifting discharge line thermostat is a common root cause of nuisance high-discharge-temperature trips, inconsistent injection valve cycling, or — in the opposite failure mode — a compressor running hot without any injection response at all, since the thermostat is the component that actually detects the condition.

Key Benefits

• Genuine OEM Thermostat: Direct-replacement discharge line thermostat built to Copeland's original sensing and switching specification.
• Restores Accurate Injection Control: A correctly functioning thermostat ensures the DTC valve or demand cooling module responds at the right discharge temperature threshold.
• Isolates Nuisance Trips: A worn or drifted thermostat is a common cause of false high-discharge-temperature faults; replacing it is a standard first troubleshooting step.
• Fast Service Fix: A targeted component-level replacement rather than a full discharge protection kit, when the rest of the system is functioning correctly.

Common Questions

• What does a discharge line thermostat do? It senses the temperature of refrigerant gas leaving the compressor and signals the discharge temperature control or demand cooling system to inject liquid refrigerant when temperature climbs toward an unsafe level.
• How do I know if this part has failed? Symptoms include a compressor running hot with no injection response, nuisance high-discharge-temperature lockouts, or an injection valve that cycles erratically regardless of actual discharge conditions.
• Does this replace the full DTC kit? No — this is the thermostat sensing component only. If the injection valve or solenoid is also worn or failed, a complete kit such as 998-1000-52 covers both components together.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.