Where do I go from here to fix the defrost issue?
Red/brown - continuity.
Orange/orange - no reading
okay well if the heater and the defrost thermostat both checked out the only other part of the defrost system is the control board in these. the control board has the defrost control built in. you need to order and replace it, The link below is to the part you will need from a highly recommended company rated A+ with the Better Business Bureau. They offer a 100% money back guarantee, EVEN ON INSTALLED ELECTRICAL PARTS, for an entire year! They are the only company to allow returns on installed parts for a refund and offer a FULL ONE YEAR WARRANTY!
Control board I hope this helps, Please remember to rate my service 3 or above before you sign off, If you need more info, please ask me - I'll be happy to reply. You can always ask follow-up questions until you have the information you need even after rating my service. Thank you! , Bryan
The no reading on the org/org pair is that go or bad?
This has four wires.
The red/brown pair had continuity.
The orange/orange pair did not.
Is that normal or defective?
There are two pair.
Red/brown - continuity - fuse
Orange/orange - none - thermistor?