I am stumped by this blower issue. My 2008 Escape had only max speed on the blower. I replaced the blower resistor behind the glove box. The blower now runs on all four settings. The problem is I don't have four speeds, there is (1) low, then (2) & (3) are the same speed, and then (4) max. The first resistor was aftermarket Standard Ignition, I noticed that the Motorcraft part asked for a serial number break. I ordered the Motorcraft repalcement, using the build date, thinking there was a design change. I still have the same problem, the fan runs on all four switch settings, but I only get three speeds at the fan.
This is an XLT model with old fashion controls, the only thing I can think of doing is replace the blower switch. Has anyone heard of this before?