Another approach - nail them under the consumer rights act if less than 6 years old - email +pictures to their customer support.
made insubstantially and not fit for purpose ? they really should not be failing before the compressor say.
It will depend on the product and the fault ,but you could be legally entitled to a free repair or, in some cases, a replacement by the retailer for some time after the manufacturer's guarantee has expired
made insubstantially and not fit for purpose ? they really should not be failing before the compressor say.