Blower Motor high speed only

BLOWER MOTOR ONLY RUNS IN HIGH
Check for open blower motor resistor. Check for open thermal limiter. Check blower motor switch.

Blower Control & A/C On-Off Switch
The rotary blower control switch on control assembly selects blower speed. An on-off switch energizes or interrupts the compressor clutch field.

Thermal Limiter
The blower motor thermal limiter resistor is mounted on passenger-side of evaporator case, behind glove box. The thermal limiter section of resistor is an overheating protection device. If resistor circuit opens due to excessive heat, replace resistor.