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fault

In geology, a fault is a planar fracture or discontinuity in a volume of rock across which there has been significant displacement as a result of rock-mass movements. Large faults within Earth's crust result from the action of plate tectonic forces, with the largest forming the boundaries between the plates, such as subduction zones or transform faults. Energy release associated with rapid movement on active faults is the cause of most earthquakes. Faults may also displace slowly, by aseismic creep.A fault plane is the plane that represents the fracture surface of a fault. A fault trace or fault line is a place where the fault can be seen or mapped on the surface. A fault trace is also the line commonly plotted on geologic maps to represent a fault.A fault zone is a cluster of parallel faults. However, the term is also used for the zone of crushed rock along a single fault. Prolonged motion along closely spaced faults can blur the distinction, as the rock between the faults is converted to fault-bound lenses of rock and then progressively crushed.

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  1. C

    Programmer fault/wireless stat wiring?

    Hi guys, I have a fault on a clients heating system whereby the heating will stay on regardless of what the programmer is doing on its timed function, it'll switch off at the programmer (no light) but boiler will stay on until they turn the stat down, I went and looked at it, they said they...
  2. johnfarrell8225

    E911 fault - what is this stuff?

    Issue with Samsung air to water heat pump Over past 6 years we constantly get E911 faults, slow flowrate and temp dropping below 10c in the system. The pic below is from the external heat pump unit which has a filter attached to it. When tested we are been told this is not magnetic as we...
  3. D

    Vaillant ecoTec fault signal

    Does the Vaillant ecoTec have an output that I can connect to an external buzzer to alert me when it’s shut down with a fault?
  4. P

    URGENT Baxi Duo-Tec Combi 33 HE DHW Fault

    Hello, Looking for someone who can please help solve this problem and fix our boiler. Staffs area. CH seems fine. Boiler can be coaxed into full burn with the fan spinning at full speed, so I think everythings fine on the gas/air/flue/condensate side of things. If there is DHW demand on the...
  5. Stiltz

    Honeywell Controls Fault?

    Hello everyone! Since the cold weather started I’ve noticed that the Programer (Honeywell ST9420C) isn’t working properly. It doesn’t turn on/off in the auto pre set times in the C/H mode. It works correctly in the auto pre set times in the H/W mode. The C/H is effectively on constantly...
  6. D

    Worcester Greenstar 24i E9 with code 276 fault

    Hi, I am handy DIYer but not interested in touching anything boiler related! Just interested before I get a Gas safe engineer out what I could be looking at for what the problem is and rough cost. So in a nutshell, I put a radiator on in a room in the extension, noticed after that the pressure...
  7. E

    Ideal Logic +18, intermittent fault

    Have an Ideal Logic + 18 with intermittent fault. When on demand the display constantly changes from O to C but burner doesn’t start. Can fix by switching Off then On again, but this only lasts for a day or two. As it’s an intermittent fault I’m reluctant to call out an Engineer. Any ideas?
  8. N

    Vaillant F23 fault, Reading

    I have a Vaillant Ecotec Plus 424 boiler in a closed heating system with 13 rads and 4 towel rails. Rads are steel, pipes are plastic kind of "modern microbore". System water pressure is 1.1 bar. It's a fairly new house, built in 2016. The boiler was last serviced in January 2019. For the last...
  9. C

    Vaillant VRT392f fault thermostat controller

    Our VRT 392F wire thermostat control is not working, it lights up and you can change Deutch to English but then you cannot do anything else. Water leaked into our circuit board on our boiler but we have had a new circuit board put in. I looked at the thermostat control, changed the batteries...
  10. P

    Worcester green star 30si fault

    We have a Worcester green star 30si boiler Hot water is fine. Ch temp is set at 70 degrees but boiler heats to 68 quite fast then takes ages to heat to 72 when it finally pumps round system, Seems to be on constant low burn?
  11. S

    Worcester Boiler - Fault has the engineer stumped (video)

    Hello, My mum has a Worcester Greenstar HE30 boiler (15+ years old). Since its last service (and possibly coincidentally) it has been making a booming/banging sound randomly. This is a noise like a pocket of gas igniting and can be loud enough to make you jump. It's been impossible for the...
  12. B

    Ideal Vogue S32 Gen2 occasional ‘NO WATER FLOW FAULT’

    Hi, Following an Anglia Water complete loss of Water Supply in Milton Keynes, I had a call from a Tenant reporting the No Water Flow Fault On the Ideal S32 Gen2. When I arrived at the property I found the pressure in the System Loop was absolute zero. There were boiler manual papers out in the...
  13. S

    Could this be my boiler's fault?

    Hi there, the water flow in our shower has reduced considerably since we bought our house, meaning the hot water tends to cut off after a minute or two; the shower is fed by a combi boiler: Worcester Bosch RD532i, about 17(!) years old I think. I can't really say if the water pressure in the...
  14. K

    Glowworm fault flashing F then - -

    Has anyone ever seen a flashing F. then - - on a glowworm?
  15. J

    Potterton combi gold 28 HE, fault?

    Good afternoon all, I am a commercial gas engineer so little experience with domestic (although fully qualified). I have a problem with a Potterton combi gold whereas I initially had no heating. I looked at the actuator on the diverter which was not driving so for £12:50 I just ordered a new...
  16. T

    Kitchen tap design fault?

    I recently installed a C&L Bilbrough tap from B&Q in a new kitchen. Its the one with a a spout with a switch on it as well as a spray head with switch in additon to the hot/cold mixer/volume control. I have found that if both the spout and spray head are closed off and the mixer valve open...
  17. M

    2 port valve fault finding?

    Hey guys. What’s the easiest way of determining that a 2 port motor has failed? I know that if the stat is calling and the arm is set to open on the valve and the actuator is ok it will fire. Is it purely a case of checking whether 240v is at the brown and orange when heat is called for? Any...
  18. F

    Ferroli fault every Sunday

    Hey there. We have a Ferroli boiler in our commercial premises. It is set on a schedule for 9-5 Friday and a few hours on Saturday and Sunday mornings. Every Sunday morning we come into an error code of A01. I know what the code means but what I wanted help with is why does it happen on the...
  19. MrGatch

    Possible fault two-port valve

    Hoping you guys can help confirm the diagnosis of a fault before I call a plumber. I've lost heating to the upstairs zone on my heating sysem. System boiler is working fine feeding two other zones and the hot water. The zone is connected via a Nest, which is saying its calling for heat but...
  20. balders99

    Plumbing or Appliance Fault?

    Had a new Kitchen fitted just before Xmas with integrated Washing Machine and Dishwasher (never again!) Appliances are located around 3.5m away from the sink, in a corner, sink one side, appliances on the other. All hose lengths within manufacturers recommendations btw. Washing Machine drum...
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