Lochinvar & A.O. Smith 100074316 Thermistor 320734-701 This Carrier furnace control board

This Carrier furnace control board is engineered to withstand the thermal stress and electrical fluctuations common in high-cycle environments

Technicians can use the speed-up pins on the HK32EA001 board to force a defrost cycle for testing

By upgrading to the 100288444

Featuring a 3/8-inch diameter connection and precision-machined refrigerant distributor tubes

Durable Construction: Built with high-grade materials to handle the thermal cycles of gas-fired residential water heaters

Lochinvar & A.O. Smith 100074316 Thermistor 320734-701 This Carrier furnace control boardWhen you are dealing with a lockout on a high efficiency Lochinvar Knight or A. O. Smith commercial water heater, the 100074316 Thermistor is often the culprit behind exhaust related error codes. This genuine DV exhaust thermistor assembly is a critical NTC (Negative Temperature Coefficient) sensor designed to monitor flue gas temperatures. It provides real time resistance feedback to the control board, ensuring the system stays within safe thermal