Thomas Hoffmann Air Conditioning & Heating 
Trane air conditioners and heat pumps use a diagnostic flash code system to communicate faults to technicians and homeowners. When your Trane AC stops cooling, short cycles, or refuses to start, the system's control board is often already telling you exactly what went wrong — if you know how to read it. This guide covers …
Trane thermostats — including the XR402, XL824, XL850, and older TCONT series — are reliable controls, but when they stop responding or display errors, they can prevent your entire HVAC system from operating. This guide walks through the most common Trane thermostat problems, what causes them, and what you can fix yourself versus what requires …
These frequently asked questions are essential for homeowners to ask themselves when maintaining their indoor air quality. If you have questions about your air conditioner or need professional service, working with a trusted local HVAC company makes a difference. Thomas Hoffmann Air Conditioning & Heating LLC provides reliable AC repair, maintenance, and installation services for …
Here are some apparent signs that your air conditioner is about to fail. Schedule a consultation with Hoffmann Air Conditioning today. Your air conditioner is one of the most important systems in your home during the hot and humid St. Louis summers. But like any mechanical equipment, an AC system doesn’t last forever. Most air …
If your air conditioner keeps turning on and off every few minutes, it’s usually a sign that something isn’t working correctly. This issue is commonly known as AC short cycling, and it can lead to higher energy bills, reduced comfort, and unnecessary wear on your HVAC system. For homeowners in St. Louis, short cycling is …
Learn how to choose the right AC size for your St. Louis home. Discover why proper air conditioner sizing matters and when to schedule a consultation. When summer temperatures rise in the St. Louis metro area, a properly sized air conditioner makes the difference between a comfortable home and one that constantly feels hot and …