Update.....
Right.... I've had a weekend of testing and trying to solve this problem.
I have tested the fan... It works fine.
I have tested the internal temperature sensor and the atc unit itself by using (mark s's) spares.... (Cheers).
I haven't yet been able to test the resistor pack so it seems that it must be this, however...... The blowers do come on intermittently....
So the next question is would the blowers still work intermittently if the resistor pack had actually failed or is it just failing? Orrrrr could it be something else?
Cheers
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