Gary McCreadie takes us on a commercial HVAC service call troubleshooting a Carrier rooftop unit. The problem was not 100% apparent, it took a little leg work and a couple of visits to solve. https://www.master.ca/professional/ www.cintas.com/HVACKnowItAll Save 8% on your purchase https://www.trutechtools.com/ with promo code knowitall Check out the HVAC Know It All app app.hvacknowitall.com https://www.hvacknowithttps://www.instagram.com/hvacknowitall1/all.com/pages/about Visit HVAC Know It All on social media Facebook https://www.facebook.com/hvacknowitall/ Instagram https://www.instagram.com/hvacknowitall1/