Carrier 25HHA4 - T1;T2 Temperature Sensor Diagnosis

20
1 --- Open or short circuit of T1 or T2 temperature sensor --- diagnosis and solution
Error Code E1
Malfunction conditions Indoor room temperature T1 and sensor evaporator temperature sensor T2 is abnormal
Ch
ec
k
t
h
e connecons
b
etween temperature
sensor an
d
PCB
.
A
re t
h
e
c
onnecons goo
d
?
Check the connecons
between temperature
sensor and PCB. Are the
connecons good?
C
orrect t
h
e connecons
.
Correct the connecons.No
Yes
No
.
Replace the sensor.
Rep
l
ace t
h
e indoor PCB
Replace the indoor PCB
M
easur
e
t
h
e resistance va
l
ue
of
the sensor via Appendix
1
Measure the resistance value
of the sensor via Appendix 1
I
s it norma
l
?
Is it normal?
Yes