After startup and running for a while the heater stops and flashes 4 lights. Looking for a downloadable service manual for a model 422 to start repairs
check with dfitz or fordman they have the pdf file.
the service manual is just a flow chart type of manual.
it lists symptoms with possible fixes to that problem.
it doesn't have service procedures on how to take anything apart or put together.
this is where you'll need past experiences.
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