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Plumbing and Gas News

Practical tips for maintenance, service and repairs of plumbing and gas appliances

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Maintenance and Service

Boilers

Baxi Combi 80e - faulty gas valve 5107339

Baxi Combi 80e - faulty gas valve 5107339

GC.No. 4707506

Hot water is intermittent. It goes hot and then runs cold and hot again. The boiler makes clicking noises and the lights on a control panel randomly flashing from time to time. It seems like a PCB Fault but actually it is a harness or a gas valve problem. If you disconnect the gas valve wires there should be a resistance between top 2 pins around 1.5lOhms and bottom 2 pins around 2.5kOhms. Between top and the bottom around 4kOhms. If there is no resistance between any of them then replace the gas valve.

2019-06-16

Boilers

Potterton Prima F - faulty PCB 407677

Potterton Prima F - faulty PCB 407677 - the boiler does not ignite.
The fan is running and the air pressure switch is clicking however there is no spark or ignition.
Check that there is 240V between T2 and T4 on electronic board while fan is running.
If there is then replace the PCB. The part number is 407677

2019-06-09

Boilers

Vaillant ecoTec Plus 937 - Hot water pump 0020039793

Vaillant ecoTec Plus 937 - Hot water pump 0020039793 doesn't work

When this particular boiler does not produce any hot water but the heating is working the hot water pump might be faulty.

Replacement part number is 0020039793

2019-06-02

Boilers

Potterton Prforma 24 - intermittent clicking and hot water

Potterton Prforma 24 - intermittent clicking and hot water

Remove the cable from the gas valve and check resistance.
​Between top 2 pins and bottom 2 pins on the gas valve resistance should be around 2 kOhms. Between top and bottom pin resistance should be around 5kOhms. If no resistance then replace the gas valve.

2019-06-02

Showers

Hansgrohe Water is lukewarm

Need to replace the thermostatic cartridge

Isolate cold and hot water supply to the shower valve

The cartridge will require temperature adjustment after replacement

The part number is 94282000

2019-05-11

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