this OEM replacement relay is vital when diagnosing hard-start issues or "clicking" failure modes in Secop or Diversitech compressors

The kit includes the vacuum switch

and MR212 modulating valves for precise thermal management

ensuring correct bolt-pattern alignment

Durability in Extreme Environments: Features Class B insulation and a continuous air-over (CAO) duty rating to handle high-demand cycles

Carrier KH03HL003 Economizer Filter 318820-201 this OEM replacement relay isThe Carrier KH03HL003 Economizer Filter is a heavy duty aluminum mesh filter designed for high velocity filtration within Carrier rooftop units (RTU) and specific HVAC economizer assemblies. This washable, permanent filter measures approximately 15. 5 x 24. 5 x 0. 88 inches, providing a critical barrier against large particulate matter and airborne debris that can compromise heat exchanger efficiency. Engineered for low pressure drop and high airflow