I have a 2018 Ford F-150 XLT FX4 2.7L. Last year the blower motor would only work on the first two low speeds. It intermittently would shut off and when it shut off, the 2H (4x4) would illuminate on the dash. It did that for about 3 months and then completely quit. I replaced the blower motor and it fixed the issue for about 6 months and it is now back to the original issue. It hasn't quit completely, but is back to only working on the first two speeds but still has the 2H illuminate when it intermittently cuts out. From what I've read, this year and model doesn't have a separate blower motor resistor. Any help or guidance would be greatly appreciated