NHTSA Complaint #11586638 — 2017 FORD EXPEDITION

6 months ago FORD replaced my blower motor (ONLY) per the recall, it still only worked intermittently so on a return visit they diagnosed a need to replace their (Motorcraft) YH-1829 A/C Blower Motor Switch / RESISTOR AND the pigtail connector SINCE THE CONNECTION PINS HAD FUSED FROM OVERHEATING. THOSE were NOT covered by the recall notwithstanding 100's or more complaints to FORD. However, The Blower ONLY worked on high. ALWAYS on high. If the key was on, the HVAC ON/OFF was useless (It's LED would go off and on but not the blower.) Likewise speed (+) and (-) did nothing. EVERY OTHER FUNCTION/Button worked fine. Temperature could be regulated and Rear A/C could be activated just fine. Yesterday, $595 later, FORD has diagnosed the Climate Control Board (FL1Z-19980-K) in the dash. IT'S RELAY HAD OVERHEATING ISSUES. They did not replace the malfumnctioning Control Board because Part FL1Z-19980-K is on a nationwide backorder with no ETA. Oh, and when/if it does become available, FORD wants $758 to install (part, tax and labor). So, I have a irrepressible suspicion that the Control Board overheat failure is linked to the overheating/fused resistor, all stemming from the original Blower Motor overheat failure that FORD did agree to recall. But, NOW, the culprit is inside the dash and the circuit cannot be turned off. IF THE KEY IS ON SO IS THE CLIMATE CONTROL CIRCUIT WITH THE BLOWER ON HIGH 100% of my driving time. More fusing? More fire risk?