New Holland T8010 Manual page 1035

Symptom
Blower operates but not at all
speeds: no low speed and/or
no medium speed but high
speed operates.
Too little cooling, too little
heating with system
pressures and components
normal
Cab pressurization blower
does not run when switched
B+ is present.
Section 50 - Climate Control - Chapter 1
Possible Cause
Blower speed switch defective
Open line from in-line connector to motor
Motor resistor disconnected or defective
Evaporator temperature sensor failing
Open line to evaporator temperature sensor
Power and ground to cab pressurizer blower.
Fuse 10
Cab pressurizer relay disconnected or
defective.
Power and ground to cab pressurizer blower
relay.
50-1-64
Test or Reference
See Blower Speed Switch
and Blower Motor, in this
Section.
See Evaporator
Temperature Sensor, in this
Section.
See Cab Pressurizer
Blower, in this Section.