Hi Deano,
If the EAS dash lights are still all on it indicates that you have not succeeded in clearing the error codes. Is this what you mean by "four lights on dash"?
It's hard to diagnose from this distance(!) but I suspect you may be right in suspecting either the valve block controller or perhaps the EAS computer. I'd also be suspicious of the thermal cutout. Has the compressor been overhauled?
2013 D4 expedition equipped
1966 Army workshop trailer
(previously SII 2.25 swb, SIII 2.25 swb & lwb, P38 Vogue, 1993 LSE 3.9V8 then HS2.8)
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