Lennox Heat Pump Service Nationwide | Dalton Heating & Air Sandy Springs

Lennox Heat Pump Service: The Sandy Springs Owner’s Guide

We service, diagnose, and replace Lennox heat pump parts throughout Sandy Springs, GA. Most common Lennox heat pump repairs run $150 – $650 installed, depending on the part, and our trucks carry the relays, capacitors, defrost controls, and contactors that fail most often, so many calls are completed same-day. The typical way a Sandy Springs homeowner discovers a failed Lennox part is the system running constantly without changing the indoor temperature, or the outdoor unit making a sound it never made before, usually a buzz, a hard start, or a rattle from the fan area. What we are best at is walking you through exactly what failed, why it failed, and what the written price will be before a single bolt turns.

Call (478) 400-5908

One thing worth stating plainly up front: Dalton Heating & Air Sandy Springs is an independent service provider. We are not affiliated with Lennox, but we are factory-trained on Lennox systems, and we work on them every week across Sandy Springs, including the two-stage units near Abernathy Road that get pushed hard through July and August.

Which Lennox Models This Applies To

This service coverage applies to nearly every residential Lennox heat pump series installed around Sandy Springs: the Elite series like the XP20 and XP16, the Merit series like the 13HPX and 14HPX, and the Signature line with models like XP25. We also handle older Lennox units that have been running for 12 to 18 years, which is a realistic lifespan for a Georgia heat pump that cycles through humid summers and occasional ice-storm winters.

The compatibility gotcha most owners run into is the defrost control board. On Lennox units built after 2015, many boards are series-specific, meaning a board for an XP16 will not read the thermistor correctly on an XP14, even if the plug fits. The model number on the side of your outdoor unit’s data plate, not the indoor air handler, is what determines the correct replacement. If you can read us that number over the phone, we can usually tell you before we arrive whether the part is on the truck.

For Lennox parts specifically, we default to OEM Lennox components on anything involving the compressor circuit, the reversing valve, or the defrost board. Those parts carry a one-year OEM warranty, and they match the engineering tolerances of the rest of the system. For basics like capacitors and contactors, a quality aftermarket equivalent from Mars or Amrad is sometimes the better call, because the failure point is usually the same generic fatigue, and these brands have earned a solid track record.

Signs Your Lennox Heat Pump Service Is Failing

• The outdoor unit hums but the fan doesn’t spin. This is usually a failed run capacitor, the part that gives the fan motor its starting jolt. A capacitor loses microfarad rating over time, and in Sandy Springs heat, a ten-year-old capacitor is on borrowed time.
• The system runs in cooling mode but blows room-temperature air. That points to a weak compressor capacitor or a failing reversing valve. The compressor is the pricey part, so we confirm the lower-cost cause first before quoting anything expensive.
• The outdoor unit ices up in winter and will not defrost. On Lennox units, this is almost always the defrost control board or the defrost thermostat (thermistor). The board is series-specific on newer models, which is why a generic replacement board is a gamble you do not want to take.
• You hear a loud click or chatter when the system starts and stops. That’s a contactor with pitted points, or failing coils. Contactors are inexpensive, but a chattering contactor can damage the compressor if you let it go for a season, because the power is arcing across the worn contacts.
• The system short-cycles, turning on and off every few minutes. This can be a pressure switch, a thermistor, or low refrigerant. A short-cycling unit in a Sandy Springs August will drive up your power bill fast, and it is a heat pump telling you it needs attention.

Replacement Cost & What’s Included

For Lennox heat pump service in Sandy Springs, here is the honest range. These are installed prices, meaning the part, labor, and diagnostics are all in the number. The price is in writing before any work starts, on every job, without exception.

• Capacitor replacement: $150 – $250, usually same-day since we carry common Lennox ratings on the truck.
• Contactor replacement: $150 – $250, straightforward swap, done in under an hour.
• Defrost thermostat / thermistor: $200 – $350, depending on the model series and how buried the sensor is inside the unit.
• Defrost control board: $350 – $650, with the series-specific Lennox board rather than a universal one.
• Reversing valve replacement: $600 – $1,200, because it involves reclaiming and recharging refrigerant, which is labor-intensive.

Every one of these repairs comes with our 365-Day Done Right Promise in writing. If the part fails or the work does not hold within a full year, we return and make it right at no charge. That’s not a 30-day window, it’s the same guarantee we’ve run on every call since 2003.

DIY or Call Us?

Here is the honest split. You can safely check a few things yourself: the thermostat setting, the circuit breaker position, and whether the outdoor unit has a melted wire or an obvious burnt smell near the access panel. But the moment you are removing the access panel on a Lennox heat pump, you are around high voltage and refrigerant lines, and that is where a $200 repair becomes a $2,000 mistake. Capacitors store a charge even with the breaker off, and wiring a replacement capacitor backwards can blow the control board. If you’ve already got the model number, call us at (478) 400-5908 and tell us what it’s doing. Tell me what it’s doing, and I’ll tell you what it costs – in writing, before we start. Marco Benitez says that line on job sites, and it holds up, because it’s how we work every day.

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