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    contracting out

    im thinking out contracting myself out doing servicing. i have an estate car and am wondering would that suffice? im only planning on doing servicing contract so i cant see it being a problem or is it?
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    ntc and ptc

    when testing ptc and ntc is there a visual difference between the two? ive been told that ntc has two wires and ptc has 1 wire. ?
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    business tips.

    im very curious about how you older guys managed to be self employed before mobilephones etc. how on earth did you recieve job queries without mobile phone if you were sole trader??? i advertise on net which is great. but how did you fellows cope before the net? local papers? waste of time in my...
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    air test

    hi. could anyone explain what an air test refers to when testing gas pipe? i did a landlords check and the gas meter was removed just carcass in place , capped off etc etc. however another engineer said i should have done an air test on the installation pipework! he didnt seem to know himself...
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    aav

    hello. could anyone advise me of principle reason why aav leaks 1)itself faulty 2)system overpressurtized and /or faulty expansion vessel anything else ta
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    programmer

    hello. is it possible to use a dual programmer ie hw,ch with a combi or must programmer be single use ch only? bought wrong programmer as was day dreaming !!!cheers
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    boiler integrity

    hi. just wondering. if you suspect a room sealed boiler is leaking poc into the room but cant determine where the hole is would it be aceptable to through a smoke bomb into the combustion chamber thus any smoke exiting boiler will tell you where the leak is coming from?
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    scale in dhw plate exchangers

    it seems that lime scale seems to be a big problem with dhw plate exchangers. i wondering how do you recognise a scaled up exchanger, poor hotwater flow?, luke warm water? i would have though the scale would cause overheating and lockout boiler. would greatly appreciate any experience on...
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    wax diverterv valve

    how does a wax diverter on the puma work? does the spindle operate for both ch and hw or just hw? thanks.
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    business advice

    wondering if any advice for me. working for a council gas form 9-5. good money ect but ive started doing my own thing on weekends and evening. because im busy 9-5 for the moment i am only doing landlords, cookers and the odd like for like installation . ive paid 500 yell.com 5 months ago . 1...
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