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Why Is My Heat Pump Freezing Up?

November 30, 2025

Ever walked outside and noticed your heat pump coated in ice—even when it’s not cold out? You’re not alone.

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JML 260209-LG-20Anni

330 East Main Street
New Holland, PA 17557

Google Rating

4.8

Based on 236 reviews

JM Lapp LLC

4.8

14:00 22 May 26

My first floor bathroom ceiling collapsed and they were able to send out a technician with four hours. Michael called 20 minutes before arriving. He identified the problem within 15 minutes, although my issue was not one of the services that they listed on their website. I had a leak in the second floor Jacuzzi. The technician was polite, knowledgeable, came and did not object to my four dogs. I was very happy with the services and I actually spoke with him about a few other projects I need done at my home. He was able to quote me a price before he left the job. I cannot say enough nice things about this company, and I will tell you that I had also been given their name by a real estate agent friend of mine. If you need any plumbing work done, this is your place.

13:44 22 May 26

I woke up to the sound of my bathroom ceiling, collapsing. I needed emergency services because I was afraid to use either bathroom as one is on top of the other. The plumber was here within four hours, identified himself, was great, personable, did not object to the fact that I have four dogs. He came in and identified the problem within 15 minutes and had it fixed within another 15 or 20 minutes. Although the price might seem a little high, the service that he provided was not a normal fix. The problem was actually a leak in my Jacuzzi that caused the collapse of my master bedroom ceiling. The plumber identified this leak within a very short period of time, although I don’t believe that this was a service listed on the companies site.I would recommend this company, and I was also given this company‘s name from another satisfied customer. If you need a plumber, this is your company.

Emanuel Stoltzfus

16:06 21 May 26

We had a situation at our Air bnb that needed addressed immediately!Our sewer line was clogged between the house and the road.The service tech used their snake to open the affected spot with ease and without digging into the yard to find it.I appreciate this being a large company with all the tools but still are very service oriented!

Nicholas Siever

15:46 20 May 26

Great service! Showed up on time on a hot day to do a tough job without complaining. Job completed the same day. Would absolutely recommend.

Lawrence Barron

20:42 12 May 26

14:41 11 May 26

Jamie did a great job.

11:04 07 May 26

Micah Hostetter

15:56 06 May 26

Timely and very helpful. Excellent service.

20:10 04 May 26

Awesome service!

Jessica Sensenig

21:29 29 Apr 26

My water heater went out on me & within 24 hours I had a new one, thanks to JM Lapp! I really appreciated their follow through & being able to get someone lined up for me, as I was a first time customer. Matt & Brandon were kind & easy to work with, they made me feel really good about choosing this company!

15:33 28 Apr 26

12:33 24 Apr 26

I had an excellent experience with JM Lapp with the replacement of a broken water softener. The team came over to assess the situation, provide a fair quote (so fair that I didn't bother to shop it or compare), and returned within a few days to do the installation. Their crew was courteous, respectful of the home (booties, protection cloth), and very clean work. I highly recommend.

12:09 24 Apr 26

Installers were polite and professional.

Michael Corning

21:31 22 Apr 26

JM Lapp is our trusted “go to” for everything related to HVAC, plumbing, water treatment, air purification, etc. What sets them apart from my 40 years of homeownership experience? Exceptional integrity…you can trust them. All of their technicians are highly skilled (so you don’t have to worry about getting “the B team”)…they are courteous & professional…and get it right the first time. They are very responsive. They offer a broad scope of services for both new installation and preventative maintenance. Their office staff is a pleasure to work with. They value their relationship with customers. I highly recommend JM Lapp Plumbing and Heating!

12:24 14 Apr 26

Great communication and detailed explanations of what was being done and how long it would take.

18:20 13 Apr 26

Excellent customer service. Pricey, but worth it.

18:49 12 Apr 26

Excellent work done quickly great job cleaning up! I would highly recommend!

21:08 08 Apr 26

Good work but your prices are outrageous.

Antoinette Mclauchlan

16:00 07 Apr 26

The gentleman was so helpful, he explained what he was doing. He took his time to get it right. He even pet our grand dog!

13:26 06 Apr 26

I used them for the first time recently. I was very impressed with Monroe ,the plumbing and water treatment professional. He was professional, courteous and caring. I'm feeling very confident that I have picked my new water guys. They fixed a faucet and helped with my water treatment system.

19:34 01 Apr 26

Strongly recommend Curtis and Kenny. They’ve fixed a plumbing emergency and did some routine work for me. Professional and personable. Great guys to have working in your home.

Jeff And Vic Martin

12:10 29 Mar 26

09:43 28 Mar 26

Working with the team at JM Lapp was really great. The entire process for getting a new HVAC system was simple from reviewing our home to the team onsite doing the install. Everyone was extremely respectful and professional.

14:54 27 Mar 26

Very professional and thorough-alls done with a smile.

13:05 26 Mar 26

14:36 25 Mar 26

I have been dealing with Lapp since 2018 when I moved to Pennsylvania. Service has been excellent in every category.

Alejandro Gonzalez

23:49 24 Mar 26

The service vas amazing

15:39 24 Mar 26

Great experience from start to finish.

13:06 24 Mar 26

Very Happy.Diagnosised the problems.Replaced bad parts.Friendly service.

23:12 20 Mar 26

Considerate, knowledgeable and trustworthy

17:30 18 Mar 26

17:08 16 Mar 26

Kenny's always great and Curtis is learning I'm sure he'll be just as great thanks well I don't have any photos what service did I get water

13:29 16 Mar 26

Technician Don explained everything he was doing and what he found. He plunged the line and everything flowed normal again. He was very courteous and professional.

12:18 15 Mar 26

Very prompt and very polite and professional

21:29 11 Mar 26

Not pleased with the service I had from them last year. Can't itemize a bill to help you understand what it is you're paying for. But, I'm here to write this review in response to the recklessness exhibited by your drivers. Most of New Holland is 35mph so there's zero reason to go flying 60+ in a residential area with crosswalks. I've observed them driving in the other lane, not using signals, not stopping and having zero regard for those around them. On multiple occasions your drivers have pulled out right in front of my vehicle without using a turn signal. When I say right in front of my vehicle I mean I'm not even ten feet away and they'll just pull out of your parking lot. They've nearly caused accidents at N Railroad and 23 because they're speeding and turning left from the straight lane, again without signaling. It's dangerous.

16:22 10 Mar 26

My husband made an apt on Monday for a Tuesday 10 am apt the young gentlemen came an hour later yawning and looked at our issue yawning and really solved nothing

Cherian Verghese

12:26 08 Mar 26

17:12 06 Mar 26

Curtis and Kenny did a great job with everything! Very professional, respectful, knowledgable. Very happy with their service

18:53 05 Mar 26

JM Lapp installed a new heat pump in a mobile home that I own. It is an older home and it took some time to find what we needed. They went out of their way to make sure everything was what was needed. They spent the day installing the unit. Making sure that everything was working to their liking. They took the old unit and all the other trash with them which was a pleasant surprise. We thought we had to dispose of it. The unit is working to our expectations and more. Overall we were beyond pleased with everyone from the secretaries, the installation team and salesman. I would highly recommend this company.

03:30 05 Mar 26

Amazing experience. The staff was was polite, professional, and courteous. The work was done quickly and they explained everything they would be accomplishing as well as what they accomplished at the end of their work. We will be working with them again for our next projects!

02:40 05 Mar 26

Curtis and Kenny were excellent. They were very prompt and efficient with my water heater replacement and quickly solved an unrelated problem with my kitchen sink.

18:12 04 Mar 26

Ryan did a great job with our annual service. We appreciate the timely quality service and the full discussion about what the service entailed.

16:15 04 Mar 26

I really appreciated Matt’s straightforward approach to presenting my options for repair or replace. He was careful to leave things well. I also appreciated that Matt showed me the failed part.

19:06 03 Mar 26

Ken and Curtis were at my house for a blockage in the toilet line. They were professional, efficient, and friendly. They did a great job!! Thank you JM Lapp!!!!!!

22:36 02 Mar 26

Low water pressure, swapy yard at the well casing. Diagnosised via phone. Verified once they arrived and fixed the 1st time they came out. I highly recommend this company for plumbing.

Joseph Maciejewski

20:07 02 Mar 26

Very polite explained everything well completed everything professionally and in a timely manner. Called 30 minutes prior to arrival and they were right on time.

anthony roberts

18:26 27 Feb 26

Tech. Mike was fantastic! Knowledgeable, professional, and friendly. If I could give more stars, I would. Highly recommend!

17:11 26 Feb 26

The technician, was fast and friendly!

17:03 23 Feb 26

16:55 17 Feb 26

Service tech was very professional and friendly he did a great job. Thanks for your service.

02:04 14 Feb 26

I called JM Lapp to repair a burst water pipe in my garage. Kurtis and Kenny showed up twenty minutes after I called. I showed them the burst pipe and they gave me a price estimate that I couldn’t refuse. They completed the job in a timely manner. Kenny and Kurtis were courteous and professional They even treated my dogs like their own. They gave me an estimate for another job while they were here. I’ll have them out soon for the next job. Kudos all around.

15:46 13 Feb 26

20:04 11 Feb 26

Had a great experience with this company. Communication was great. Sent me a text when they were about 20 minutes out. The technician was very informative, very professional, and seem to know his job very well. I also liked that the technician took his boots off before he entered my home, not sure if it’s common practice, but I just thought it was thoughtful of him.

Thelma Stoltzfus

21:22 10 Feb 26

Very happy with the work!

00:39 07 Feb 26

18:35 05 Feb 26

We were without water. They came in a timely fashion and did what was needed to keep this from happening again.

00:55 05 Feb 26

18:55 03 Feb 26

Travis Whittington

17:09 03 Feb 26

I am very pleased with their work, they are very thorough.

20:16 02 Feb 26

Prompt and explained what needed to be done

18:30 31 Jan 26

JM Lapp came out quickly and were very professional. They found an affordable solution even when they could have charged me a lot more. High level of service and integrity. Highly recommend !

15:33 29 Jan 26

He did a great job!

14:53 28 Jan 26

Service, knowledge, experience, A+. Zach gave us options on a couple things didn’t push anything either way. Been using JM Lapp plumbing for years. I will continue to do so.

Amanda Ratjavong

14:26 27 Jan 26

14:00 27 Jan 26

18:24 26 Jan 26

Jim was great, very professional and knowledgeable of our older system. Heater is working great and Jim did an awesome job.

13:25 23 Jan 26

We had the failure of a boiler in our home during a very cold time last week and JM Lapp was able to send out a technician and solve the problem for us in less than four hours. They did an outstanding job communicating, and an outstanding job of fixing the problem, both short-term and long-term.

14:53 21 Jan 26

Matt is fabulous! He is thoughtful and accurate in his assessments of issues, careful and meticulous in his work product, and clear and friendly in his communication. Matt installed a redo of our powder room and we couldn’t be happier with the outcome. We will always ask for him to be our plumber when calling JM Lapp!

23:41 20 Jan 26

21:32 16 Jan 26

MaryAnne Cullen

19:49 15 Jan 26

JM Lapp provide excellent and prompt service.

00:02 14 Jan 26

Mr. Flores did thorough work. The bathtub leak was fixed properly, and the water filtration filter was changed quickly and professionally. Highly recommend.”

21:35 11 Jan 26

Very conscientious PM of my K2 heating system.

20:59 10 Jan 26

Emergency service was excellent Matt was here on a very timely manner and replaced my well pump .very happy!!!

23:31 07 Jan 26

20:07 05 Jan 26

Great job as usual. Thanks, Matt.

Debbie Mckinney

16:33 05 Jan 26

Matt did a wonderful job. Very nice guy

16:36 02 Jan 26

Great Service, Jesus was great and had good attention to detail. Highly recommend

Jodi L Anderson

14:49 31 Dec 25

This is our second experience with JM Lapp and we really appreciate the solid service. The techs were prompt, friendly and very knowledgeable . JM Lapp is definitely our go to!

20:39 29 Dec 25

Catherine Ingram

23:16 18 Dec 25

Jesus Flores installed our garbage disposal and kitchen faucet. He was very professional and careful, thorough and friendly.

Deb Eshleman-Bitts

15:58 13 Dec 25

JM Lapp LLC plumbers were courtious, explained everything step by step and performed work in a timely manner. Gave estimates as requested. Cleaned work area after completion - I would definitely use again.

21:53 12 Dec 25

Great experience getting a new boiler from JM Lapp. Very fairly priced compared to some other local options, and the whole team was great, from sales to install.

sean fitzpatrick

16:36 12 Dec 25

I needed some pex tubing repaired and shut off valves replaced. Workers were friendly, happy to answer all my questions and did a quick clean job

13:29 12 Dec 25

21:42 11 Dec 25

Outstanding communication. Very knowledgeable of our product and issue.

16:22 05 Dec 25

After a routine yearly service and maintenance appointment, JM Lapp notified me that my boiler was leaking, 25 years old and needed to be replaced. No one wants to hear that news, but JM Lapp 's professionals made the switch from the old one to a new boiler in two short days, provided me with plenty of space heaters, took special care to keep the areas clean and made an expensive event as painless as possible. I will continue to use JM Lapp in the future for all my plumbing, heating and air conditioning needs.

21:28 04 Dec 25

A nice person and company to work with

Terrence Longmore

22:10 24 Nov 25

Our sewage ejector pump (the injector pit pump) died without warning on a Friday night, and within an hour of calling on Monday, Mike was at our door. They showed up exactly when they said they would, diagnosed the failed pump quickly, and had a new Myers unit installed and running that same day. No mess, no upselling, just fast, clean, and professional work. Will work with them again.

21:54 24 Nov 25

We had a water line installed for our ice maker. Monroe was great. He was very knowledgeable and informed me of everything he was doing and answered any questions I had. I appreciate the professional service of J M Lapp.

19:26 19 Nov 25

16:35 17 Nov 25

Thomas Sobers (Tjs)

15:32 17 Nov 25

Just had Donald from Lapp plumbing do service on our furnace. He did an outstanding thorough check of the furnace and was very professional and honest in his opinion and price was very reasonable. I would definitely call Lapps four all my heating air-conditioning and plumbing.

13:44 14 Nov 25

15:10 11 Nov 25

Very happy with service. Courteous clean and professional

20:41 10 Nov 25

Highly recommend Lapp plumbing.Jen and Kirsten at the office were very polite and efficient with my info and account. I received a window of time for my service and a text from Matt that he was on his way. Matt was very professional and did an amazing job for us. Will definitely use Lapp in the future if needed again!

15:35 10 Nov 25

Excellent service

Virginia Curbelo

15:01 06 Nov 25

Was very please with service, Zach very pleasant n responded to my needs n concern recommended him to family n friend

15:04 31 Oct 25

Efficient and very competent! Thanks for great service.

donald goularte

19:48 27 Oct 25

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