might be different in England steel, as in Scotland buyer has six days from exchanging contracts to have the heating system examined, and any defects have to be reported within the six daysHouse sold as seen , if the vendors really want the property then stick your heels in and say take it or leave it.
slagging off the engineer who correctly pointed out your problem is unlikely to get you much advice on here, would you have preferred that he said sort the flue , then came back and told you to sort the gas supply, then came back and told you sort the ventilation , do you see where I am going with this
The last gas tech could have serviced the appliance
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