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CONFIG.SYS is the primary configuration file for the DOS and OS/2 operating systems. It is a special ASCII text file that contains user-accessible setup or configuration directives evaluated by the operating system's DOS BIOS (typically residing in IBMBIO.COM or IO.SYS) during boot. CONFIG.SYS was introduced with DOS 2.0.

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    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...
  2. D

    Grundfos Default setting

    Hi everyone. Bit of a daft question but I’ve just had the pump replaced by the housing group where I live. They’ve fitted a Grundfos UPS3 15-50/65 and the fitter has left it on the default constant curve 3 which is a bit noisy and seems overpowered for the property, they’ve also snapped the...
  3. R

    Nest 3rd gen default to hot water on.

    Just had a problematic install of a nest 3rd gen. System is s S plan, wiring was a bit fiddly but got it done. Switched it all on and hot water cam on. Checked nest thermostat and hot water is set to off. Rechecked all working again and narrowed it down to heat link constantly calling for...
  4. D

    Can I use PEX pipes to feed a default radiator?

    I'm pretty much a novice at DIY, fitting a Charnwood Country 8B woodburner with a back-boiler which puts a maximum of 7kW into the water, and the default radiator is 1.335kW. I'd like to use 28mm PEX pipes, as they're so much cheaper than copper; but I don't know whether it's safe to do that...
  5. F

    Baxi Duo-Tec GA40 pre heat and settings?

    The new Baxi Duo-tec 40GA has the factory default parameter setting to 00, being "instantaneous appliance" ie. the setting 03 "instantaneous appliance with pre-heat function" is not the default. Given the preheat is marketed as an advantage, why is it not the default? The installation I am...
  6. T

    Lifestyle LP522 Defaults to 'Twice' after power cut.

    Hi, Looking for some advice if I may as to what is wrong and how to correct the problem I'm having with my Lifestyle LP522 programmer. When we have a power cut, both the hw and ch default to the 'twice' option when power is restored. We've been having a couple of power cuts lately and been...
  7. C

    ferroli optimax HE 31c default TS

    I have received this email from a customer of mine. Can anyone help? We rented out our house and the people who rented it sad they got someone to look at our boiler. I believe they tampered with the settings and the boiler is not working as it did before. All I want is to know the default...
  8. 2

    hot on/hot off

    i am working on an old system,and have been asked to replace a switch which is broken that controls hot water only or heat and hot water it is on 22 mm copper ,tenant says it had a black plastic switch on it before it broke,any ideas where i may get one from or a alternative,
  9. T

    baby on the way

    CRAP CRAP AND MORE CRAP the misiss's waters have broken eeerrrrrmmmmm eeeeeerrrrrmmmmm HELP stiched me right up all I want is to go to bed and iv got a 3 & half year old alsleep in bed that needs looking after now i need to bee In two places at once HELP im happy thats she is on her...
  10. G

    air and gas circuit default at the same time

    Hi there. I've got Saunier Duval boiler. It shows that the falt with the air and gas circuits have been detected. I've checked the fan (OK), air switch (OK), also replaced ignition P.C.B, still nothing Any ideas? Help!
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