I bypassed the control board to test cooling system and the refer. got cold 0 degrees overnight . hooked backup no

Question

I bypassed the control board to test cooling system and the refer. got cold 0 degrees overnight . hooked backup no

Bypassed control board and refer. gets cold to 0 degrees in freezer 34 degrees in bottom . I hooked back up the power to the control board and refer. does not work . How can I test the rest of the system ?? And the control board . This is a Norcold N811LT and its in a 2005 Jayco trailer . I have already replaced the therrnister and there was no help in getting cold..

Status: Open Oct 01, 2018 - 09:30 AM

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Staff Answer

Sep 28, 2026 - 07:36 AM

Since it cools when bypassed, the cooling unit is fine. The controls are the issue. With a new thermistor, check the high-temp limit switch on the cooling unit (it should read closed) and the AC heater's resistance, since the board shuts down if these read wrong. If those are good, the board is the likely cause. Send us your N811's serial number and we'll tell you which board fits.

If you have any questions, just reach out at info@rvfridgeguys.com or call us at 800-712-8822. You can find everything we carry at www.rvfridgeguys.com.

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