Customer Questions and Answers for Ptc Starter (Compressor Start Thermistor), 1 by Mcf

A PTC starter that helps engage a compressor's start winding for reliable motor startup and shorter run-up. Use this direct-replacement thermistor when the compressor struggles to start or only hums instead of running. What it does:

• Provides a timed reduction in start-circuit resistance so the compressor motor can start smoothly.
• Helps prevent continuous start winding current after the compressor runs, protecting the motor.
• Common symptom fixes: compressor hums, won't start, or system cycles without cooling.
• Works as the electrical start device used in many refrigeration and small motor applications.

• One PTC starter (single thermistor start device).

• Disconnect all power before attempting replacement; risk of shock or equipment damage.
• Match the starter to the original part and wiring; replace only with the correct part number.
• Handle terminals carefully; do not short or bend leads.
• This is a non-serviceable component — replace rather than attempt repairs.