HVAC Symptom Diagnoser
Something wrong with your heating, cooling, or water heater? Answer 2 questions and get an instant diagnosis from Big Mike’s 20+ years of Detroit Metro HVAC experience. Includes DIY fixes you can try first and guidance on when to call a pro.
What’s giving you trouble?
Select your equipment type to start.
What’s the problem?
Pick the symptom that best matches what you’re seeing.
BBBAccreditedBusiness
Diagnosis Backed by BBB Accredited Expertise
This tool is built on 20+ years of real Detroit Metro HVAC experience. Big Mike’s is a Better Business Bureau Accredited Business — verified credentials, real insurance, honest pricing. When DIY isn’t enough, you can trust who’s coming to your home.
View Our BBB Profile →Why Trust This Diagnosis?
Family-owned and licensed. We’ve diagnosed thousands of HVAC issues across Wayne, Macomb & Oakland County. The DIY tips here are the same ones we share with customers in real service calls.
20+ Years Experience
Licensed Michigan Mechanical contractor with EPA 608 certification.
Same-Day Service
Most Wayne County calls on-site within 2–4 hours, Mon–Sat 9 AM–5 PM.
$79 Service Fee
Honest, upfront pricing. Credited toward repair. No emergency surcharges.
BBB Accredited
Verified credentials and real accountability. CO testing registered.
When the DIY tips don’t fix it, here’s who our customers trust to come fix it right.
Fast, reliable, and affordable! Arrived in under an hour, diagnosed the problem on the spot, sourced the parts themselves, and had me running again quickly.
GREAT SERVICE! Came in a timely fashion, figured out the problem in 2 minutes and the furnace was up and running in 15 minutes.
Amin and team were quick and thorough diagnosing and repairing the furnace. Response time was also very timely. Will recommend and use again.
Fast and reliable! Had my heat back up and running in about 30 mins!