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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. J

    WB Greenstar 4000 Combi Fault Code 2965

    What is the boiler flow temperature required to flag this 2965 fault code?. This, I believe, is a blocking code that trips the burner but when/if it resets. the burner will refire without any boiler reset? If this fault code is up while in CH mode and there is a demand for HW, will the boiler...
  2. S

    Fd fault on Ideal Heat 15

    Got fd code on Ideal Logic Heat 15. Had two plumbers out and no joy. It’s had a new water flow sensor, flush with sentinel x800 and refurbished grundfos water pump. Boiler tries to light and water pump power light comes on but goes off immediately and boiler flashes fd again. It’s heat only so I...
  3. Baxter76

    Potterton Promax 18 - Fault

    Hello Wondering if anyone can offer any clues please // Potterton Promax 18 // Had an E1 error code, repressurised via with filling loop // Boiler fires but now the pressure runs up from 1.5 mark in the green up to 2.5 in the red then flicks off. // Error code again // Once held in reset for...
  4. T

    Fault on ferroli falcon 2

    Hello, I have a ferroli falcon 2 boiler (yes it is pretty old). A few days ago the hot water started going hot and cold when running. Monitoring the boiler, the demand light works fine. When the water gets up to temperature every 10 seconds or so, the boiler stops for a fraction of a second...
  5. C

    Britony combi se 40 60 80 fault

    Hi all I have a britony combi se 80 with fault 40 60 80 had british gas out to repair under homecare cover but they can't seem to repair it. They have been out 7 times so far and fitted a new pump heat exchanger air pressure switch and a pcb. Does anyone on here know what else could be the...
  6. T

    rads cold no indication of boiler fault HW fine (pls urgent)

    Hi All Bit of an urgent one being that time of year and can't get a plumber out until after xmas even on an emergency callout I have just tried to turn on my CH for the first time this year as I have a number of guests coming for xmas dinner but even after an hour all the rads are stone...
  7. M

    Worcester 30i ionisation fault

    Hi all. I hope you are well. Need some advice on this boiler and fault. E229. Went there and condensate was totally blocked so cleaned it and still not fixed. Then serviced it and still got the fault. Called up worcester and one says its the gas valve as it is making a 3 whoosing noises while...
  8. I

    F1 fault code on morco fed24ed3

    Morco feb 24ed3 has a f1 fault code. The burner reading is fine. The fault is intermittent, sometimes the boiler won't ignite on either hot water or heating. Everything seems to run but it just fails to ignite. I've changed the rectification and the spark electrodes. Cleaned the burner and the...
  9. E

    Aqualisa Quartz 9.5kw Electric Shower - Only getting cold water?

    Hello All, New to the forum so apologies if do any faux pas. But I have an Aqalisa Electric Quartz Shower 9.5kw (8 years old) and currently it is only giving out cold water regardless of where the temperature control is placed, the only difference is the more you move to the dial to the cold...
  10. R

    Vaillant Sensohome and fault codes.

    Hello All I have an ecotec 630 with Sensohome controls. Should the fault codes shown in the boiler also be reflected in Sensohome control? All appears to be working ok but the Sensohome has a fault code relating to the outside sensor (F521) which I can't seem to clear. The sensor is working ok...
  11. P

    Ideal Logic Combi 35 constant F1 fault

    Got up on Wednesday morning no hot water, (only cold water coming out of hot tap). Checked boiler, it had zero pressure and F1 fault showing. So I refilled the pressure using the filling loop, up to about 1bar which is where it usually is, which worked fine, had hot water all day. Same thing...
  12. E

    Intermittent fault on Y plan

    Customer complains of Intermittent heating on Y plan with Stat satisfied. New boiler fitted last year (no permanent live required or fitted previously) on an existing Y plan system. Existing timer was a Randall 103 (no hot water off position as its a timer not a programmer). The customer wanted...
  13. T

    Uncoded intermittent ignition fault, Ideal logic heat 18 .

    Ideal logic heat 18. Uncoded intermittent fault near end of days use only. Burner reignites every 15 seconds on and off, but no fault code showing. Boiler isolated and restarted okay but same uncoded fault repeated at end of next day.
  14. C

    Intermittent heating fault

    Hi Wondering if anyone could point me in the right direction please. We have an old traditional old Potterton E50 boiler with an old Honeywell time switch and a more recent Salus wireless thermostat. I have completely powered down and re-set the Honeywell and Salus a couple of times and...
  15. A

    Intergas boiler , vessel and PRV fault

    hello After an engineer serviced our intergas boiler, the pressure was going down continuously. He told us that the prv was faulty and quoted us £200 to have it replaced, so we asked around and the last engineer told us that the pressure vessel, PRv are both faulty and the filling loop is...
  16. 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...
  17. 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...
  18. 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?
  19. 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...
  20. 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...
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