Illustrated Wiring Diagram - Baxi Combi 105e Installation And Servicing Instructions
Gas fired wall mounted combination boiler
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Also See for Combi 105e:
- User operating instructions manual (13 pages) ,
- Installation & servicing instructions manual (60 pages) ,
- Installation and servicing instructions (56 pages)
Table of Contents
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Fan
Flame
Sensing
Electrode
F2
b
1
2
A1
3
b
Spark Generator
br
- brown
g
- green
bk
- black
g/y
- green / yellow
b
- blue
w
- white
r
- red
Air Pressure
Control PCB
b
br
br
bk
br
4
1
2
3
4
A2
5
5
6
7
8
br
b
b
Overheat Stat
Gas Valve
13.0 Illustrated Wiring Diagram
Switch
1
2
3
4
5
6
7
8
9
10
A4
br
6
br
5
b
4
b
3
r
2
b
1
1
2
3
4
bk
A3
9
b
bk
br
bk
4
3
1 2
Optional Timers
Central Heating
Temperature Sensor
Domestic Hot Water
Temperature Sensor
Domestic Hot Water Flow
Priority Pressure Switch
r
g
r
g
g
Hydraulic Differential
g
Pressure Switch
r
r
bk
bk
A5
Pump
Mains Input
Link
bk
g/y
Reset Selector Switch
br
g/y
b
br
Fuse
b
37
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Questions and answers
Have bled my radiators today, respressurised the system to 1.25 bar but now I **** unable to get heating or hot water - red flashing light (fault on pump or low pressure). As I said I have reset the pressure and don't think there is a fault, it was working yesterday!
If a Baxi Combi 105e has no heating or hot water after bleeding the radiators and repressurizing the system, possible causes include:
1. Airlock in the System – Air trapped in the boiler or pipes can prevent proper circulation.
2. Low System Pressure – Ensure the pressure is at the correct level after repressurization.
3. Safety Thermostat Activation – If the boiler overheated, the safety thermostat may have shut it down. Reset it by turning the selector fully anti-clockwise to the reset position.
4. Flame Failure – If the flame failure light is on, the boiler may not be igniting properly, requiring service.
5. Air Flow Monitor Issue – If the air pressure sensing device detects a problem with the flue system, the boiler may not operate.
If these checks do not resolve the issue, contacting a service engineer is recommended.
This answer is automatically generated