--- title: "603 Mechanical" description: "No heat on a Saturday is the kind of call 603 Mechanical has taken. A 2024 Google customer said John and Keith came out to the house on a Saturday when the" doc_version: "2026-10-21" last_updated: "2026-10-21" --- # 603 Mechanical **Trade:** HVAC / Heating & Cooling · **Address:** 418 Lafayette Rd, Hampton, NH 03842 · **Phone:** (833) 603-4822 · **Website:** https://603mechanical.com/ · **Languages:** English **Rating: 3.5/5** (medium confidence) — from 7 reviews across 8 sources. 100% of sentiment-scored reviews read net-positive. Last 6 months: 0 reviews, 0 negative. ## The honest read No heat on a Saturday is the kind of call 603 Mechanical has taken. A 2024 Google customer said John and Keith came out to the house on a Saturday when there was no heat, diagnosed the issue and ordered the parts needed. The Hampton company's website describes refrigeration, heating and air conditioning work for southeastern New Hampshire and the North Shore of Massachusetts, and it states 24/7 emergency service. Its BBB page lists the business as 603 Refrigeration LLC, serving residential and commercial properties, with an A+ grade. A 2023 Google customer said the company pinpointed the real problem after another vendor came out to diagnose it and was far off. A 2024 Google customer said Jonathan took the time to answer all their questions. A 2025 Angi customer said the workers came on time, found a problem and replaced it. A 2023 Google customer said the company went out the next day to help that customer's friends with their HVAC. **Strengths:** - A no-heat Saturday call — a 2024 customer said John and Keith came Saturday - Second-opinion diagnosis — a 2023 customer said they found the real problem - On-time arrival — a 2025 Angi customer said the workers came on time ## Claims & citations Every claim below is backed by real evidence rows — uncited claims are dropped in code before publication. - A 2024 Google customer said John and Keith came out on a Saturday when the house had no heat, diagnosed the issue and ordered the parts _(confidence: medium)_ - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSUN2MjhqN1pnEAE!2m1!1s0x0:0xb64270e94a53e9a6!3m1!1s2@1:CIHM0ogKEICAgICv28j7Zg%7C%7C?hl=en-US) — “5★ 10 STARS if I could!! John and Keith came out to my house on a Saturday when we had no heat. Diagnosed the issue and ordered the parts n…” - A 2023 Google customer said the company pinpointed the real problem after another vendor's diagnosis was far off _(confidence: medium)_ - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChRDSUhNMG9nS0VJQ0FnSUNacktSbRAB!2m1!1s0x0:0xb64270e94a53e9a6!3m1!1s2@1:CIHM0ogKEICAgICZrKRm%7C%7C?hl=en-US) — “5★ Can't say enough about this group. Helped us out when no one else would and even pinpointed the real problem when another vendor came out…” - A 2025 Angi customer said the workers came on time, found a problem and replaced it _(confidence: medium)_ - [Angi](https://www.angi.com/companylist/us/nh/portsmouth/603-refrigeration-llc-reviews-1.htm) — “The gentlemaen that have come to my house from this company have been spectacular. They came on time they’re efficient. There’s no nonsense.…” - The company's website describes refrigeration, heating and air conditioning work for southeastern New Hampshire and the North Shore of Massachusetts _(confidence: medium)_ - [Official Website](https://603mechanical.com) — “About (self-reported, verbatim): As recognized experts for all things refrigeration, heating and air conditioning for the South-eastern New …” - The company states it offers 24/7 emergency service _(confidence: low)_ - [Official Website](https://603mechanical.com) — “Stated offer (self-reported): 24/7 emergency service” - BBB grade of A+ _(confidence: high)_ - [Better Business Bureau](https://www.bbb.org/us/nh/hampton/profile/heating-and-air-conditioning/603-mechanical-0051-92067755) — “Better Business Bureau grade: A+” - 5 stars from 5 Google ratings and 5.0 stars from 3 Angi ratings _(confidence: high)_ - [Google](https://www.google.com/maps/search/?api=1&query=603%20Mechanical&query_place_id=ChIJ__8TDAq_4okRpulTSulwQrY) — “Google: 5★ from 5 ratings” - [Angi](https://www.angi.com/companylist/us/nh/portsmouth/603-refrigeration-llc-reviews-1.htm) — “Angi: 5.0★ from 3 ratings” - Specializes in HVAC / Heating & Cooling _(confidence: high)_ - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSUN2MjhqN1pnEAE!2m1!1s0x0:0xb64270e94a53e9a6!3m1!1s2@1:CIHM0ogKEICAgICv28j7Zg%7C%7C?hl=en-US) — “5★ 10 STARS if I could!! John and Keith came out to my house on a Saturday when we had no heat. Diagnosed the issue and ordered the parts n…” - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChRDSUhNMG9nS0VJQ0FnSUNyX2ZGUBAB!2m1!1s0x0:0xb64270e94a53e9a6!3m1!1s2@1:CIHM0ogKEICAgICr_fFP%7C%7C?hl=en-US) — “5★ I felt compelled to write a review after working with 603 Mechanical for the first time. Jonathan was professional, knowledgeable, thorou…” - [Official Website](https://603mechanical.com) — “About (self-reported, verbatim): As recognized experts for all things refrigeration, heating and air conditioning for the South-eastern New …” ## License Status: **not_found** — verified against the official NH state registry, never self-reported. Re-check at the official registry: https://forms.nh.gov/licenseverification/ ## Sources - [Reddit](https://www.reddit.com/r/MercedesDiesel/comments/1gw4hsd/tacoma_swap/): 0 community mentions discussing this business - [Google Reviews](https://www.google.com/maps/search/?api=1&query=603%20Mechanical&query_place_id=ChIJ__8TDAq_4okRpulTSulwQrY): Listed on this source - [Official Website](https://603mechanical.com): Self-reported profile and service details - [Local News](https://www.autoevolution.com/news/ferrari-ff-drag-races-kia-ev6-gt-deeply-regrets-decision-228788.html): Listed on this source - [Google](https://www.google.com/maps/search/?api=1&query=603%20Mechanical&query_place_id=ChIJ__8TDAq_4okRpulTSulwQrY): 5.0★ from 5 ratings - [Better Business Bureau](https://www.bbb.org/us/nh/hampton/profile/heating-and-air-conditioning/603-mechanical-0051-92067755): Listed on this source - [Angi](https://www.angi.com/companylist/us/nh/portsmouth/603-refrigeration-llc-reviews-1.htm): 5.0★ from 3 ratings - [Local Chambers of Commerce](https://business.hamptonchamber.com/members/searchalpha/0-9): Listed on this source ## Recent reviews - **Angi · 2025-08-01**: The gentlemaen that have come to my house from this company have been spectacular. They came on time they’re efficient. There’s no nonsense. They found a problem replaced it and said please call back if there’s a problem and they couldn’t have been nicer. I would highly highly recommend them to anyo… - **5/5 · Google Reviews · Joseph Dudlek · 2024-12-15**: 10 STARS if I could!! John and Keith came out to my house on a Saturday when we had no heat. Diagnosed the issue and ordered the parts necessary. Fast, reliable, professional! Highly recommend. - **5/5 · Google Reviews · Beth Griffin · 2024-07-10**: I felt compelled to write a review after working with 603 Mechanical for the first time. Jonathan was professional, knowledgeable, thorough, and took the time to answer all my questions. It is rare that I write a review and just as rare to work with such a wonderful company. I highly recommend 603 … - **5/5 · Google Reviews · Tyler Isabelle · 2024-04-12**: Exceptional service from 603Mechanical! From start to finish, every aspect of working with them was top-notch. Their attention to detail, expertise, and professionalism truly set them apart. Highly recommend!! - **5/5 · Google Reviews · Marissa Sterl · 2023-09-05**: Can't say enough about this group. Helped us out when no one else would and even pinpointed the real problem when another vendor came out to diagnose and was so far off. Jon and his team are all amazing, knowledgeable, professional and courteous. Can't recommend them enough, I will now be using them… - **5/5 · Google Reviews · gianna · 2023-02-15**: ABSOLUTELY AMAZING this team is very responsive and fixes everything in a timely manner, if there’s an issue they can do it! They also helped my friends out with there HVAC, went out the next day! Best crew around - **Angi · David V. · 2023-02-01**: Customer service is what makes them an excellent company. They are very responsive and always come in and ready to work. --- Data freshness: last scanned 2026-10-18T02:53:03.634Z. Cite as: 603 Mechanical — Tavlee (https://tavlee.com/contractor/603-mechanical-hampton) Source: https://tavlee.com/contractor/603-mechanical-hampton ## Sitemap [Full site index](https://tavlee.com/sitemap.md)