Ask for a finding
A serviceable connection may lead to a different proposal from damage to the unit. The assessment should explain what was found and what work is available.
Agree the scope
Discuss the proposed work and any access limitations before proceeding. No universal lifespan, fixed repair outcome or guaranteed saving is promised. The enquiry concerns existing equipment rather than a new installation.
A useful distinction
Compatibility and access may make two visually similar units unsuitable substitutes. A replacement proposal should follow the actual findings and installed arrangement, rather than a decision based only on a product photograph.