Northern Lights — Heat Exchanger Cleaning

Maintenance

From a Northern Lights owner's manual covering: M20C, M844, M844L, OM844K2, SP5, SP6. Check it applies to your exact model before use.

Applies to: Northern Lights M20C, Northern Lights M844, Northern Lights M844L

Procedure

1. Clean the heat exchanger core once a year or after 2500 hours of operation.
2. Drain expansion tank and heat exchanger.
3. Remove heat exchanger end covers and remove core.
4. Clean the inside of exchanger core tubes using a metal rod. Flush, inspect and clean again if necessary.
5. Reassemble. Fill the cooling system, start the engine and check for leaks.

Full service-parts list: Northern Lights M20C →, Northern Lights M844 →, Northern Lights M844L →

Source: Northern Lights owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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