Jelrus Temp Master Control Unit

The Jelrus Temp Master Control Unit is a dedicated temperature controller used in industrial furnaces and semiconductor/metal fabrication equipment. Known failure modes include malfunctioning thermocouple or RTD sensors, degraded power‑supply output (often due to aging capacitors or rectifier diodes), and worn relay contacts that interrupt heating element drive. First‑check diagnostics: verify 120 V input voltage and correct polarity; inspect the control board for burnt components or loose solder joints; read any stored error codes from the display or diagnostic port; and test sensor output against a calibrated reference to confirm accurate temperature feedback.[oss-gpt-20b]

Need your Jelrus repaired or tested?

We specialize in the repair and refurbishment of high-end industrial control electronics and power systems like this unit.

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