Hiring a contractor to maintenance your equipment? This Maintenance Contract sets the expectations between the client and the contractor.A maintenance services agreement is a legal document between two parties in which one party provides ongoing maintenance support for the other party. Download our free Equipment Maintenance Agreement template for your business needs. A preventative maintenance agreement is a service contract designed to help businesses maintain their equipment and avoid costly repairs. Dos and don'ts of an HVAC maintenance agreement; 7 free HVAC service contract templates; Tips on how to sell your HVAC maintenance program. Order. This document contemplates that the buyer and the seller will negotiate and incorporate all of the terms and conditions of the transaction into this. Contracts for maintenance service providers needs to be complete, correct, and concise to exceed client expectations. Scheduled repairs and the replacement of parts on an as needed basis. (Vehicle repair is a taxable service.) An Iowa resident sends tangible personal property out of state to be repaired.