Contact 5 Diamond Mechanical Call 1 (833) 353-HVAC or use form below: Contact Us Name* First Last Email* Phone*Address Street Address City State ZIP / Postal Code Are you a new or existing customer?* New Existing Request for* Installation Estimate Service Maintenance Comments or Details Company Address 9962 Prospect Ave. Ste E, Santee, CA 92071 Hours:Monday – Friday 8:00am to 6:00pmSaturday 8:00 to 5:00pmClosed Sundays