91.19. An itinerant merchant is exempt from the application of subparagraphs b and c of the first paragraph of section 244.7 of the Act where the following conditions are met:(a) he presented himself at the address of the consumer upon the latter’s express request;
(b) the consumer’s request relates to the repair, at the consumer’s address, of an appliance essential to heating or to the production of hot water;
(c) the appliance is beyond repair and must be replaced; and
(d) the itinerant merchant enters into a contract, upon the consumer’s express request and at the consumer’s address, the sole object of which is the replacement of the defective appliance.