S40 AC works sometimes HELP!

I have an issue to were my air will only work if i have the blower set to 5, position to AUTO and I wait for "4" beeps of the key being turned to the "on" position before i start it.
Wont work if i wait for more than or less than 4 beeps or if I take it off of max blow speed.
Any reason why?
The part itself is about $50 but apparently you can take it apart and simply replace the resistor inside. I have not tried but I'm told it's an easy/cheap job.
It is easy with a few hand tools. I just ordered the OEM resistor from ebay:
1pcs Motorola MJ802 Transistor to 3 TO3 NPN 30A 100V 200W | eBay
Here is the heat sink with resistor:
1pcs Motorola MJ802 Transistor to 3 TO3 NPN 30A 100V 200W | eBay
Here is the heat sink with resistor:
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87roadwarrior
Volvo 240, 740 & 940
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Aug 26, 2015 10:26 PM




