They were recommended by a friend of mine, and they were both very inexpensive and prompt. They…read morereplaced my furnace and air conditioner, replaced the condenser outside and helped upgrade our ductwork. Mark is really nice and I trust him implicitly.

I had Mark's heating quote a project for me along with 5 other competitors. To start things off,…read morethe person that answered the call was helpful and thankful for the opportunity. Mark made himself available to my time so he could stop by and understand the project. His quote came back quickly and he was able to start work in a reasonable time. He always returned phone calls and was a true pleasure to work with. Mark's work quality is excellent AND his prices were the best I found! Excellent Job Marks Heating!

I just really appreciated what seems like an honest assessment. I was looking for a second opinion,…read morebecause two other companies had recommended major, costly repairs or replacement for my gas furnace. The Grenz folks came, carefully looked at the unit, and said, "If it were my furnace, I wouldn't do anything. It is running the way it's supposed to." This second opinion cost me something, naturally, but it also saved me between $5,500 and $19,500 (two quotes from the other two companies). Jim seems like a straight shooter. I'd recommend you give these folks a try.

He called me back and talked me through the fix. He did not wait to come out and wouldn't take any…read morepayment for his assistance. He clearly knew what he was doing. He was able to talk me through several troubleshooting exercises without seeing the gas fireplace itself. If I have any HVAC or fireplace needs in the future, I will definitely use Grenz

I was really excited to have Mack out to quote a replacement furnace/AC, based on everyone's…read morecomments on Reddit, Nextdoor, and elsewhere. I really wanted someone local, independent, and that I could call and they'd answer -- and be honest. But... I was incredibly underwhelmed. I was after a full replacement system, with a slight preference toward replacing the AC unit with a heat pump. I also wanted a two-stage system due to slight temperature imbalances in the house. He very quickly dismissed heat pumps, saying that they're "worthless" in Wisconsin, and he also didn't entertain the idea of a two-stage system. I asked about going from a 1-inch filter to 4-inch, and he said, "No, I wouldn't do that. The thicker filters restrict airflow too much; I would just get a higher quality filter." This is just blatantly incorrect and the exact opposite is true. 1-inch filters with higher MERV ratings are what restrict airflow. I also had a 45,000 BTU furnace, which had had no problem heating our home (and it was 20 years old! -- both the unit and house), but he very quickly said, "Oh, that's too small. You should get an 80,000," without taking any sort of measurements, asking any questions, or looking at the rest of the house. You can't do a load calculation based on...nothing? And you can't just nearly double furnace capacity without causing issues (mainly, that it's going to short cycle from being oversized). And, as mentioned earlier, it wasn't going to be a two-stage furnace, so it would have run at that full 80,000... Maybe he's good at repairs (I don't know), and maybe he's well priced (he came in second cheapest out of the four bids I got), but these were all just fairly big red flags for me that he wasn't a match for me for doing a new install. I got a two-stage heat pump and two-stage furnace setup from elsewhere and so far am very happy!

We woke up to no working furnace last Tuesday. We called one company. The service call was…read more$154.00. Ok, understand. They told us that it was a blower motor and it would cost about $1500.00 to get us up and running. They said we were better off getting a new furnace costing about $6,000.00. We decided to check around and decided to call seasonal survival. WOW. I called and they were able to come out later the same day. It was the circuit board. He happened to have one on his truck. $375.00 and 20 minutes we are up and running! We even tried to give him a tip and he said nope, we don't do that. If you need any heating or plumbing issues do not hesitate to give them a call!

AC was out. They said we had a leak and either $3000 to repair or $8000 to replace. Plus they…read morechanged out our thermostat for No Reason and it sucks: no directions given. We got a Second opinion and for $700 they fixed it!

We had a new furnace installed in 2023 and a new air conditioner in 2024. We signed up for the…read moreannual "Maintenance Agreement". Well, we are 100% satisfied with the quality of workmanship, professionalism, prompt service, friendly attitude and excellent products sold. We have never needed a service call on either machines to date. The annual maintenance is such an outstanding offer. It gives you peace of mind that your investment is being taken care of. I would love to recognize Ray Seeber, our technician for his outstanding quality of work. He was so informative, patient and respectful. Thank you Ray, we look forward to seeing you again. Kettle Moraine, you are certainly the BEST!!!! Mr.& Mrs. O'Brien

We have done business with Kleckers on 2 occasions. First they installed a brand new furnace with…read morean Aprilaire air filtration system (about 2 years ago) and a new thermostat and that has worked flawlessly and is easy as it gets to operate. Then late this Spring we had them replace our old central air conditioner, and that works like champ also. They are very professional and take care of their customers - if anything is wrong they will fix it. Both installations went flawlessly for us and the units work perfectly. A++

AS A DISABLE Vietnam Military Veteran I was robbed, scammed, by Klecker's Heating and Air…read moreConditioning demanded $700.00 for one of their Technician who worked on my Air Conditioner for a little over two hours and never fixed it. I had to call someone else who only charged me $176.00 and fixed it. Klecker's Technician must of hated his job. He was very RUDE, DISRESPECTFUL, and kept wanting to use my bathroom while smoking a pipe. If he hates his job so much, why is he still working their.

Last winter the furnace in my rental house quit working, I called them and he diagnosed the…read moreproblem, went to Waukesha for parts, returned and promptly restored the heat. Five at-a-boys for them !!!

This company displays professionalism, expertise and excellent service. Both TJ and Mike are very…read morehonest, reliable, and timely. They leave you with the feeling like you were their only customer. TJ's dad installed our heating and air conditioner 20 years ago with a young TJ by his side ;) It is so cool to see the same business practices in play, to make customers want to keep coming back! Keep up the good work guys! I highly recommend this company.

My furnace went out yesterday (Friday) afternoon, and I called him last night. He said his day…read more(Saturday) was booked but if I was up early enough he could be here by 6 am. He was here promptly at 6am and fixed the problem in under 30 minutes. He was very professional and had incredible rates. This is not service you see anymore. THANK YOU SO VERY MUCH FOR OUTSTANDING EARLY SATURDAY MORNING SERVICE AT A STEAL!

The best service i have ever gotten by far. Im a landlord and have been since the 1980s. I have…read morebounced around to many different Hvac companies over the years as i never was really happy with any of them. Then i found a+ the fix about 5-6 years ago. Every time i have called them they are there pronto. Often in just a few hours. They know what they are doing too. They offer low cost options often. They arent just parts replacers looking to jack up a bill. I will never call anyone else.

Our AC unit went out suddenly at 9pm on a humid, summer night. My husband called in the morning and…read moreby noon, Richter Heating and AC had a tech out to us and our AC was working great. What a relief! Scott was our technician, who was very knowledgable, efficient and so nice. He replaced a capacitor, cleaned the coils, checked all fluid levels, tested it and even swapped out a new furnace filter that was old. The cost was very affordable. Fantastic service! Would call them again in a heartbeat. Great job!

Bill is not polite and extremely rude. On 7/14/26 our AC in our apartment we rent went out. Mind…read moreyou for back story my boyfriend and I go to work from 6am to around 5pm. The AC stays on at 75 or 76 while we are gone because we have animals. When I get home it gets set to 70. I got home on the 14th at 6pm and it was at 75 and still running. So, I set it to 70 and went about my night. At 8 I realize it is roasting in our apartment. I got to the thermostat and it says 79. The AC is actively running so I go to a vent and its blow warm air out. I made sure the heat was not accidentally put on and it said Cooling. So, I waited for my boyfriend to get home at 8:30 and he changed the filter and still nothing happened. So we turned it off to maybe reset it. It never turned back on. Finally after it got to 82 in the apartment it turned bsck on when we set it to 67. Again it was just blowing warm air. Finally we called pur landlord which connected us to the emergency maintenance. After 10-15 mins went by the maintenance called us. My boyfriend was talking to a man on the phone and the man asked right away "so you have issues with the AC" my boyfriend said yes the air is on but the temperature in the apartment keeps raising. The man over the phone goes "what is it at now?" We said 81 and was set at 67 because thats what it turned on at. The man cut us off immediately and said "oh thats your fault. AC cannot be set up 70 otherwise it breaks so I guess it will need ti he fixed". We were caught off guard by that comment because it did not make sense but we dont know anything about AC so we just said okay. Then the man goes "so we can schedule it to be fixed tomorrow (Tuesday) around 7am". Of course if there was no other time we said thats fine but what should we do in the meantime should we keep it off. Again this man interrupts the question and this time gives attitude he said, "well we are busy so if you guys think you can just cut the line of everyone else in like with AC issues then I am going to reschedule this appointment to Thursday so you can sit in the heat". We were immediately appalled as his comment especially when we asked a simple question. This is when I took the phone and asked him why the attitude from him was needed. I admit I was angry but I kept the conversation respectful. I said yhe comment was unnecessary as we were asking a question. He replied with "no you guys were acting like you should be the priority over every other customer we have we are busy so if thats the case I can happily tell my team not to get there until Thursday" I continued with that is not what was said. I told him we were asking what to do in the meantime as it is 82 and we will not be home at the time he will be here Tuesday. The responded with "The temperature is 80 i have worked in weather way over that so you are fine" I responded with thats great that you think that but we have pets that cant do that. He said "that sounds like you should have thought about it prior" I responded with we pay rent and a high amount of rent to live in this apartment and this is how you are talking to us we have no AC and it was 96 outaide today about will be tomorrow what are we supposed to do. He said "it sounds like you guys should have had a plan b in place for situations like a spare AC unit" I said again we rent we pay enough to where having a spare unit we are fine with you coming here tomorrow around 7am or so but we will not be here how do yoy plan on getting into our building? He said "well you arent leaving it unlocked? How will we get in i have a team coming" i said thats why I asked since we will not be here and it will be locked. He said "well we have a unit key" i said great. Will you be coming to our apartment or a team. He said "my team will be coming to your apartment" I said what is your name and he said Bill from Richters Heating and Cooling. He then said "well do i have permission to enter your apsrtment or what" i said yes and then said thank you and hung up. The entire time this conversation happened Bill had nothing but a poor rude attitude. He was extremely passive aggressive and just belittling. He blamed us for everything and was extremely unprofessional. The way he talked to customers was ridiculous. I understand that it is busy as we never had an issue with the AC being fixed the next day. But to jumped to conclusions and assume that is what we meant and tell us that he will be moving our time to thursday so we can sit in the heat was so uncalled for and down right repulsive. Everything he said was uncalled for and inappropriate. I wish I had recording this phone call to submit it as proof because I was in shock that we were being talked to that way over a simple question. Not once did we say anything about being first or anything. We were respectful the entire time. Bill does NOT care about customers or their problems.​ This is HIS job and HE DECIDED to do this. It was completely and utterly ridiculous.