In the Oconomowoc area, Grenz Service Company, LLC is well known for providing exceptional furnace repair, installation, and service. The people we send out to serve you are also top notch, something you'll see in their reviews below. Everyone you deal with at our company has the goal of making sure your experience with us will be so good you'll call us every time you need help. You can feel confident working with Grenz Service Company, LLC because we stand behind our work and comply with all local codes. This is why, as you can see by the map and reviews below, we are rated so highly for Furnace and Air Conditioning Repair in Oconomowoc, WI. Call us today at (262) 646-3880!
I’ve continued to use Grenz for several years and they never disappoint. Good, honest, hardworking, reliable and knowledgeable are just a few words I don’t just throw around. Jim and all of his employees are good people and beyond trustworthy. To say I trust them is an understatement. I don’t trust too many people. I trust Grenz in my home even if I’m not there. If that doesn’t say something, I don’t know what does. Thanks again Jim for all you’ve done for us!
I had my gas fireplace inspected and my furnace checked for the winter season. Jim and Bill were polite, skilled and did an excellent job. Bill caught a wiring issue on my humidifier that was not done correctly by the installer and never caught by the other company I had been using for my maintenance. I feel confident in getting a maintenance contract.
I really appreciated the technicians honesty and accurate diagnostic skills. The work was done quickly and I now have heat again.
Jim came out to fix our fireplace that had stopped working. He was able to fix it quickly and at an affordable price. Sometimes having services coming into your home can be awkward, but he was very friendly and explained what the problem was and how he fixed it. Highly recommend Grenz Service!
Jim called me back very shortly after I had left a message. He was able to come out to my house the same day. He had been recommended by my son and I too would recommend him. My air conditioning was not working and Jim was able to fix it the same day because he explained that he carries these parts with him so his clients don’t have to wait. Especially in the recent humid days we are having
I called at 8 AM with a down AC unit and the service came out and it fixed in hour. Unbelievable response.....
They responded to my concern immediately, were there quickly the day before a holiday, diagnosed and fixed the problem within minutes, good price. Definitely recommend. Family owned business.
Great service, friendly, knowledgeable & trustworthy
Grenz has been providing service in our homes since 1999 and we are very satisfied customers! They’ve done maintenance, installed new furnaces and air conditioners. All work has been top notch for 20 years.
Knowledgeable, honesty, Integrity, and trustworthy are not words I just throw around. Grenz earns all of them in spades. They have earned my business for as long as I have breath in my lungs. Call them, you won’t regret it.
Contacted Grenz on a Sunday. Jim was back in touch within an hour. The problem was fixed the next day, after other contractors either didn’t know how to or didn’t want to repair. Or worse, they pushed to replace the furnace. This long time issue is now fixed and no longer a worry.
Grenz has been our heating/cooling service provider of choice over the years. We own a 1800’s Victorian home where we find most home service providers flee. Jim and team are super friendly, consistent with great service and pricing is competitive. Thanks for updating both our heating and cooling systems, the new energy efficient systems are awesome!
Grenz and Jim Jr give consistently outstanding service.
We are so happy to have found someone to fix our problems.
Install unit heater
Weather king furnace repair
Tempstar furnace check out
Duct work repair
Walk in cooler install
Ice Mach repair
American standard install