Carrier 48TJ660007 Heat Exchanger

The Carrier 48TJ660007 Heat Exchanger with Gasket Kit is a factory-authorized OEM replacement heat exchanger for Carrier, Bryant and Payne gas-fired packaged rooftop units. It is a 9-cell, non-condensing assembly, so each of the nine cells lines up with one burner on the combustion side of the unit, and it ships with the gasket kit needed to seal the new assembly into the heat section. The previous service number was 50DK406560, and older paperwork may show the same part as 48TJ660-007. Any of those numbers leads to this assembly, which makes the 48TJ660007 the one to order for a heat exchanger replacement on a compatible rooftop.

Published application data ties the 48TJ660007 to the 48TCFD and 48HJE rooftop series, including the 48HJE014 size and models such as 48HJE014-550. Carrier builds a family of similar-looking heat exchangers, so the number on the unit's parts list matters. The 48TJ660006 (which replaces 50DK406559 and is listed with a baffle and gasket kit), the 48TJ660005 and the 48TJ660010 are separate heat exchanger numbers for other model series, not alternates for this one. Confirm the full model number, serial number and heating configuration before ordering, because production revisions can change which assembly a given unit uses.

In a gas-fired rooftop, the burners fire into the heat exchanger cells while the draft inducer pulls the hot flue gases through each cell and out the vent. The supply blower pushes air from the building across the outside of the cells, and that air picks up the heat. The two gas paths must stay completely separate. When thermal cycling or corrosion cracks a cell, flue gas can leak into the supply air stream and the flame can be pushed out of its normal pattern. Typical symptoms are flame rollout, a flame that distorts or lifts when the blower starts, repeated rollout switch trips, soot on the burners, and carbon monoxide in the supply air. Before condemning the exchanger, confirm the inducer draft, pressure switch, flue passages, burner cleanliness, gas manifold pressure and airflow are all correct, since restricted airflow from a dirty filter or a slow blower can overheat and crack cells. After installation, check that every gasket is seated, the burners align with the cell openings, and run a combustion analysis and temperature rise check against the unit's nameplate.

Key Benefits

• Direct OEM fit: Built to the factory Carrier configuration as the replacement for 50DK406560, so the cell layout, mounting and burner alignment match the original on compatible rooftop units.
• Gasket kit included: The supplied gaskets seal the new assembly at the connections that carry flue gas, so there is no need to chase down separate seals mid-job.
• 9-cell configuration: The 9-cell, non-condensing design restores the original heat transfer surface and keeps the burner-to-cell arrangement the unit was built around.
• Easy to cross-check: Findable under 48TJ660007, 48TJ660-007 and 50DK406560, which helps when the unit's parts list or an older invoice shows a different designation.

Common Questions

• Will the Carrier 48TJ660007 fit my rooftop unit? It is published for the 48TCFD and 48HJE series, including 48HJE014 models, but fit comes down to the complete model and serial number and the unit's heating configuration. Match the number on the parts list before ordering.
• What does the 48TJ660007 replace? It replaces 50DK406560, and the older hyphenated listing 48TJ660-007 points to the same assembly. It comes with a gasket kit, and fresh gaskets should go in at every joint that was opened.
• How can I tell the heat exchanger is bad and not another part? Look for cracks or burn-through with a mirror or inspection camera, watch the flame while the supply blower starts, and take a carbon monoxide reading in the supply air. Rule out the draft inducer, pressure switch, dirty burners and low airflow first. A confirmed crack means the unit should stay off until the heat exchanger is replaced.

This item is not eligible for free shipping and must be shipped via trucking. Please contact us for a freight quote.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.