a strange "formaldehyde" smell

Dual Fuel Utility: Optimized for use with natural gas and liquid propane furnace configurations

running one furnace for low demand and both for high demand

ensuring that the control logic accurately reflects ambient or coil temperatures

Technicians should verify part number 024-25517-000 compatibility with the specific unit’s voltage and amperage requirements to ensure safe branch circuit integration

Carrier HH18HA192 Limit Switch 322838-752 a strange "formaldehyde" smellThe Carrier HH18HA192 is a high limit, auto reset limit switch designed for critical thermal protection in heating applications. This genuine OEM Carrier replacement part is engineered to monitor heat exchanger temperatures and interrupt the electrical circuit if internal conditions exceed the safe operating threshold. With a strictly calibrated temperature range of 140 190F, it serves as a primary safety component to prevent equipment overheating and