(1) Subject to the provisions of subsections (2) and (3) of this section and of the preceding section on liquidation and limitation of damages,

(a) the agreement may provide for remedies in addition to or in substitution for those provided in this Article and may limit or alter the measure of damages recoverable under this Article, as by limiting the buyer's remedies to return of the goods and repayment of the price or to repair and replacement of non-conforming goods or parts; and

(b) resort to a remedy as provided is optional unless the remedy is expressly agreed to be exclusive, in which case it is the sole remedy.

(2) Where circumstances cause an exclusive or limited remedy to fail of its essential purpose, remedy may be had as provided in this Title.

(3) Limitation of consequential damages for injury to the person in the case of goods purchased primarily for personal, family or household use or of any services related thereto is invalid unless it is proved that the limitation is not unconscionable. Limitation of remedy to repair or replacement of defective parts or non-conforming goods is invalid in sales of goods primarily for personal, family or household use unless the manufacturer or seller maintains or provides within this state facilities adequate to provide reasonable and expeditious performance of repair or replacement obligations.

Limitation of other consequential damages is valid unless it is established that the limitation is unconscionable.

Lease or rental of personal property—Disclaimer of warranty of merchantability or fitness: RCW 63.18.010.