To make it easier for you, best to know the specific make and model of your machine. The model number and the serial number help locate a compatible item for your property. Prices vary according to product quality. Do not be fooled by brand names though. Being expensive does not necessarily denote quality. Choose what is tried and tested by other consumers.
Improper maintenance will cause periodical breakdown of the machines causing avoidable expenses. Some of the consumers are under the impression that warranty conditions attached to the machines will take care of the expenses in case of breakdowns. But they forget the fact that they can invoke the warranty conditions only for inherent manufacturing defects and not for defects caused by improper handling and maintenance of the machines. In many cases manufacturers find that the problems caused to the machines are not due to any deficiency on their parts, but due to sheer negligence of the users. Ultimately consumers will have to pay for the repairs or replacements of the parts in the machines, causing avoidable expenses.