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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


Vaillant ecoTec pro24 - fault F62 PCB 0020132764 or Gas valve replacement

Vaillant ecoTec pro24 combi boiler has an intermittent fault F.62 which stops hot water and heating to work

  • Fault F.62 indicated problem with a Gas Valve or PCB. 
  • Need to carry out the following test to identify:
    • To test the gas valve remove the electric plug from the gas valve and measure the following:
      • Pins 1-2 - 34 Ohms
      • Pins 3-4 - 17 Ohms
      • Pins 1-4 - 51 Ohms 
    • To test the PCB
      • In the top left corner of the Printed circuit board find terminal X20
      • Measure DC voltage across Blue and Red wires with power on
      • The voltage should be 24V DC and when the gas valve opens after the spark it should go down to 12V
    • If PCB has failed the test then replace the part: Vaillant EcoTec Plus Printed Circuit Board (PCB) 0020132764



Hudson Reed Traditional Dual Exposed Thermostatic Shower Valve ITY309 - Thermostatic cartridge replacement DC70T

Traditional Dual Exposed Thermostatic Shower Valve ITY309 doesn't mix hot water

  • Isolate hot and cold water supplies to the shower
  • Remove the thermostatic cartridge from the shower body
  • The thermostatic cartridge is held in place by a brass nut.
    • The thermostatic cartridge will need a little shake once nut being removed to come out of the body
  • Put the cartridge into a de-scaler and leave for 1 hour
  • If the thermostatic cartridge still soesn't mix hot water then cartridge replacement is required
  • The replacement part is Hudson Reed, Ultra, Crosswater Thermostatic Cartridge DC70T32 with 20 teeth



Triton 83310120 Thermostatic Cartridge Problem - No Hot Water or No Cold Water

If only hot water or cold water is coming out of your shower, there are several reasons this could be.  To determine the problem, follow the following steps:

1.  Make sure there is hot water entering the shower.

2.  If there is, the problem could be a pressure issue whereby some shower valves struggle to mix when there is too much pressure from either the hot or the cold feeds.  If your shower was previously working then this shouldn't be a problem as it's likely your pressure will be the same as before.

3.  Now, turn off or isolate the water to the shower.

4.  Remove the 82210120 thermostatic cartridge.  This will remove by pulling it out (not a screw fit).

5.  Make sure there is nothing blocking the cartridge inlets.

6.  If nothing is blocking then it's probably an issue with the inner workings of the cartridge and the cartridge will need to be replaced.

7.  The part needed is the Triton 883310120 thermostatic cartridge.  

8.  This cartridge is also used on Triton Norina, Dart 2, Amala, Altessa, Cassini and Sentiment shower valves.



Crosswater Belgravia Exposed Valve not regulating water temperature correctly

Crosswater Belgravia thermostatic mixer shower not regulating water temperature correctly.

  • First, make sure there is a balanced hot and cold water feed entering the shower mixer.  If there isn't, the thermostatic cartridge may have trouble mixing the water.
  • Check whether there is a constand supply of hot water entering the shower mixer
  • If the above two points are okay then isolate the hot and cold water supply and remove the thermostatic cartridge.
  • Make sure there is nothing blocking the gauze filters on the thermostatic cartridge.
  • If nothing is blocking gauze filters, replacing the thermostatic cartridge is likely to fix the problem.
  • The corect part number is Crosswater CA43-29 Thermostatic Cartridge



Aqualisa Colt - Dripping shower cartridge replacement Aqualisa Cartridge Grey 022801

Aqualisa Colt - Dripping shower valve from the shower head making a loud noise during the night

  • If the shower is dripping the cartridge needs to be replaced
  • Isolate hot and cold water supplies to the valve
  • Cartridge replacement  Aqualisa Cartridge Grey 022801 


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