Emergency Repair
Emergency furnace repair · 4°F outside · Response: 3 hrs
Review No. 001
“Our furnace quit at 11 PM on the night the temperature dropped to four degrees. I called three companies. Two didn't answer. Thermostat picked up on the second ring. By 6 AM the heat was back on and the technician — Rafael — had left a written breakdown of exactly what failed and why. No vague invoice. No upsell pressure. Just the truth and a fair price.
Margaret & Tom Holloway
Ravenswood, North Side
January 2026
Full System Install
Full HVAC install · 1920s two-flat · Ductwork redesign
Review No. 002
“I've owned this 1920s two-flat for eleven years and every HVAC company I called either walked away from the ductwork or quoted me numbers that didn't add up. Thermostat sent a senior tech who spent forty-five minutes in the basement actually measuring the space before he said a single number. The install was clean, the price matched the quote exactly, and my tenants upstairs finally have even heat for the first time in years.
Darnell Washington
Hyde Park, South Side
October 2025
Seasonal Tune-Up
Seasonal AC tune-up · Blower repair · Coil cleaning
Review No. 003
“I scheduled a tune-up because I was nervous about the summer — our central air had been making a sound I couldn't describe. The technician, James, listened to it for about ten seconds and told me exactly what it was: a loose mounting bracket on the blower. He tightened it in five minutes and spent the next thirty minutes cleaning coils and checking refrigerant levels that nobody had touched in three years. He told me the system was in good shape and I didn't need a new one. That honesty is worth more than any discount.
Priya Nair
Pilsen, West Side
June 2025
23 min
Average Response Time
Measured across 1,200+ service calls in 2025. Emergency calls answered within 2 rings. Technician dispatched within the hour, 94% of the time.
Data as of 2026
Ductwork Balance
Ductwork rebalance · Victorian build · 2-day airflow analysis
Review No. 004
“We bought a Victorian in Andersonville knowing the HVAC would be a challenge. The previous owners had patched and re-patched the ductwork for decades and the third floor was always fifteen degrees colder than the first. Thermostat's team spent two days doing a full airflow analysis and rebalancing. The house is actually even now. My daughter's room feels like part of the house instead of a different climate zone.
Kevin & Lucia Ostrowski
Andersonville, Far North
September 2025
Compressor Replacement
Compressor replacement only · Saved full system cost · August heat
Review No. 005
“Middle of August. My compressor died on the hottest week of the year. I had three quotes. Two of them recommended full system replacements. Thermostat's tech told me the air handler was fine and only the compressor needed to go. He showed me the diagnostic on his tablet — actual numbers — and explained what each reading meant. I saved nearly four thousand dollars by not replacing equipment that didn't need replacing. I tell everyone I know.
Simone Adeyemi
Logan Square, Northwest
August 2025
94%
Repeat Customer Rate
Of homeowners who call Thermostat once, 94% call again. The other 6% moved out of the city. We know because they told us when they said goodbye.
Data as of 2026
Annual Maintenance
Annual maintenance · 7-year customer · Full system inspection
Review No. 006
“We've been with Thermostat for seven years now. Every October, same call, same level of care. What I appreciate most is that they remember the house. The tech this year mentioned something the tech from two years ago noted in the file about our secondary drain. It's a small thing but it tells you they're paying attention. This is what a neighborhood business is supposed to feel like.
Robert & Diane Kowalczyk
Bridgeport, South Side
October 2025
22 yrs
Serving This City
Founded in 2003 by Marcus and Elena Petrov, who still answer the phone. Three generations of families in some neighborhoods. The same phone number since day one.
Data as of 2026
Ready when you are
Your system deserves someone honest.
No vague invoices. No no-shows. No replacement upsells on systems that just need a repair. We show up, we explain, we fix it right.
No form to fill. No account required. Just a call back within 2 hours.