I'm not refusing, just querying the Invoice, since on day one (and I am grateful that he resolved the issue for the tenant, he got a reading of 0ppm and 10 days later, the Gas Safe cert guy and then the same engineer as day one, both got reading that showed CO to be at dangerous levels.
I agree that a certificate is only good for the time of the test, but if that is the case, then PAT tests, annual Gas Safe certs, MOTs etc should be done every day to ensure that the item being tested is safe all the time!
Funny how that Gas safe Engineer didn't even blink when he got a reading of 0 ppm, especially when the CO alarm had gone off as well, and the appliance had been sealed off, whilst I can tell you if you get a reading of 0ppm, then that would have aroused some suspicions, clearly means something is wrong with the guys analyser, there is no way on this earth that you would get a real low reading of 0 ppm on an old boiler.
I also disagree that any minor dust can cause such a high reading in 10 days, the cause of your boiler's high readings should be investigated further until the problem is found, in the mean time keep that CO alarm in place and advise the tenants to turn off the appliance when it goes off instead panicking and starting a world war III.
I just had my rented property's new CH installation serviced that was installed last year with a brand new boiler and even that gave a reading of 29ppm of CO.
unless you are mixing Ambient CO reading that was 0 ppm.
I am also a landlord and some gas safe engineers really boil my **** as well , not only I have met many cowboys but some are total incompetent, rip off merchants. Hence I now have a regular guy who rescued me a couple of years ago when my Warm Air Heating was fooked up by stupid tenants stuffing the ducts with padded jacket and caused the cupboard to overheat as the warm air vents were blocked and the heat started to escape into the cupboard and melted my boiler's thermoplastic front panel! STUPID TENANTS also blocked all permanent ventilation to stop drafts and we landlords are blamed for conserving our expenses when the tenants really are the biggest culprits, already my rented house has started to suffer from condensation problems and mould growth in some rooms where tenants don't open windows and dry clothes on radiators!
Oh also thanks to my last bitch tenant a single parent lady on social benefits, she not only abused my generosity when I reduced my rent from £700 to £500, but she also stopped paying me rent for 7 months and before I took any actiuon against her, that took further 2 months to serve her notice, she left the place in absolute state, in the end because I do not trust any tradespersons, I renovated the place myself
I may also add that my last tenant suffered me a total loss of £28grand ! that is not penny pinching, it is mega bucks, stupid tenants, It would be more profitable to keep houses empty than to rent them out to stupid irresponsible tenants since property prices would shoot up when there is less houses available to rent, and we would make more for our investment that way then to suffer all the bloody hassle of renting to idiotic tenants. Shame I actually kept one property empty for 10 years until the Council started to double my council tax and then threatened to place a CPO, only that forced me to start renting. Otherwise by freedom of choice I would keep my property empty and not having to suffer insults from the law, which protects morons.