© 2022 Staheli West
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Test 19: All Sensors Offline / Fuse Keeps Blowing
1. Open
Panel 2 (Touch screen should be off).
2. Find the analog input terminal strip shown in the picture below.
3. Make sure the multimeter is set to measure Ω (Ohms) / continuity.
4. Place one lead in a ground (GND) block and the other lead on each of the 24 V wires one at a time;
use a small flat head screwdriver to remove each wire (Test 17) one at a time there should not be
continuity (you should see an “OL” Open Loop).
5. If there is a 24 V wire that has continuity with a ground (GND) wire, unplug the respective sensor.
6. Test the wire again with the sensor unplugged. If there is no continuity, this indicates a faulty sensor;
If there is still continuity, this indicates a faulty wire harness.
*If no faulty sensors or faulty wiring is found, replace the 24 V regulator. 2015-2017 machines part# 10302.
2018-2022 machines part# 11389.
Test 19.A: Faulty Wire Harness Test (Multimeter Required)
Tests
1
5
6
3
2
Faulty
Sensor
Faulty Wire
Harness
1-Flue T
emp Sensor
2-Boiler W
at
er T
emp Sensor
3-F
eed W
at
er T
emp Sensor
4-Ambien
t T
emp Sensor
5-Boiler Door T
emp Sensor
6-
St
eam p
si 1 Sensor
7-
St
eam p
si 2 Sensor
8-
Boiler W
at
er Le
vel Sensor
9-
Supply
W
at
er
Le
vel Sensor
10-
Fuel Le
vel Sensor
11-
Fuel Pump p
si Sensor
12-
Pr
opane p
si Sensor
13-
No
zzle 1 p
si Sensor
14-
No
zzle 2 p
si Sensor
4
Card 1
Card 2
See Test 17 for
how to release
a wire from a
terminal block
24 V wires
GND block
