Hatfield Brothers Mechanical: Qualified HVAC Services Serving Derry, NH 03038

First, check your thermostat is set to 'heat' and that the circuit breaker for the furnace hasn't tripped. If those are fine, it's best to call us right away, especially during our cold winters. Ignition failure can be caused by a faulty flame sensor, ignition control, or gas valve—issues that require a trained technician for safe diagnosis and repair. We prioritize emergency calls for heating problems to restore your home's warmth quickly and safely.

Our standard HVAC maintenance is designed to improve system efficiency and prevent breakdowns. For your furnace or heat pump, we perform a thorough inspection, clean essential components like the flame sensor and coils, check electrical connections, test safety controls, and measure system performance. This proactive service can often catch small issues, like a worn part or airflow restriction, before they lead to a major failure, helping your system run reliably through Derry's seasonal extremes.

We offer installation of both traditional tank and modern tankless (on-demand) water heaters. The best choice depends on your household's hot water usage, available space, and energy efficiency goals. During a consultation, we'll assess your needs, explain the pros and cons of each type, and provide a clear estimate. Our installation includes proper sizing, safe connections to gas or electrical lines, and ensuring it meets all local codes, giving you reliable hot water for years.