How Long After a Thermocouple Failure Should It Be Replaced?

Jun 03, 2026

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Based on your previous focus on hot runner thermocouple temperature measurement and emergency fault handling, the replacement timeframe can be clearly defined according to different scenarios:

Complete Failure Scenario: When the thermocouple is completely open-circuited and has no signal output, it must be replaced immediately after shutdown to prevent the hot runner from continuing to heat uncontrollably, leading to melt decomposition and equipment overheating damage.

Temporary Emergency Scenario: When only a replacement solution is used to temporarily maintain production, a formal replacement must be completed within 24 hours. Long-term reliance on temporary temperature measurement methods should be avoided to prevent the potential for temperature runaway.

Slight Aging Scenario: When there is only a small temperature measurement deviation and it is not completely failed, a shutdown for replacement should be arranged within 3-5 working days to prevent further aging and sudden failures that could affect continuous production.

The actual replacement timeframe needs to be flexibly adjusted based on the hot runner's production conditions, prioritizing production and equipment safety.

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