(1) If, at any time during the tenancy, the landlord fails to carry out any of the duties imposed by RCW 59.18.060 , and notice of the defect is given to the landlord pursuant to RCW 59.18.070 , the tenant may submit to the landlord or his or her designated agent by first-class mail or in person a good faith estimate by the tenant of the cost to perform the repairs necessary to correct the defective condition if the repair is to be done by licensed or registered persons, or if no licensing or registration requirement applies to the type of work to be performed, the cost if the repair is to be done by responsible persons capable of performing such repairs. Such estimate may be submitted to the landlord at the same time as notice is given pursuant to RCW 59.18.070 . The remedy provided in this section shall not be available for a landlord's failure to carry out the duties in *RCW 59.18.060 (9) and (14). If the tenant utilizes this section for repairs pursuant to RCW 59.18.060 (6), the tenant shall promptly provide the landlord with a key to any new or replaced locks. The amount the tenant may deduct from the rent may vary from the estimate, but cannot exceed the two-month limit as described in subsection (2) of this section.