Sines & Sons Heating & Cooling Inc
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Claim This BusinessAbout Sines & Sons Heating & Cooling Inc
Sines & Sons Heating & Cooling Inc has anchored itself in Arnold, Maryland since 2002, earning a 4.8-star average from 55 reviews. The family-owned contractor holds a Maryland HVAC license and operates Monday through Friday from 8 AM to 4:30 PM, serving Arnold and nearby Anne Arundel County communities including Millersville, Severn, and Crofton.
What distinguishes Sines & Sons is their straight-dealing philosophy. The crew does not pad repair estimates to chase work that will not last. Several reviewers noted the technician recommended replacement over a costly repair when the math did not favor a fix, and the team honored that call with a system that performed reliably afterward. Their service agreement is optional, not pushed, which signals confidence that customers will return when the equipment actually needs them.
What Customers Say
All 55 reviews carry five stars. Four reviewers specifically name technician John, citing prompt same-day scheduling and honest cost estimates that came in below the initial diagnosis. Three reviews describe situations where Sines & Sons won the job by being the most cost-effective bid among multiple contractors, and one notes a problem that other firms could not correctly identify.
Working Hours
| Sunday | Closed |
| Monday | 8 AM–4:30 PM |
| Tuesday | 8 AM–4:30 PM |
| Wednesday | 8 AM–4:30 PM |
| ThursdayToday | 8 AM–4:30 PM |
| Friday | 8 AM–4:30 PM |
| Saturday | Closed |
Services
AC Repair and Maintenance
Diagnoses and tunes aging cooling systems, including misdiagnosis corrections that other firms missed. Preventive maintenance keeps older Trane units operational.
Heating System Repair
Furnace diagnostics and heat exchanger evaluations. One reviewer used Sines & Sons for a second opinion that correctly identified the root cause.
HVAC Replacement and Installation
Full system swaps with transparent pricing. Three replacement options presented, 48-hour installation turnaround, and minor post-install adjustments at no additional cost.
Heat Exchanger Inspection
Specialized assessment for suspected failures. The team refused a repair that would have been a temporary fix and proposed a durable replacement instead.
Emergency Same-Day Service
Rapid response for equipment failures that pose immediate comfort or safety concerns. One reviewer accessed same-day service during a heat wave without an existing service agreement.
New Construction and Retrofit Installation
Residential HVAC installation for new builds and aging equipment swaps. Workmanship covers the installation, and post-installation support addresses any startup issues.