42-106257-01 Pressure Switch

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42-106257-01 Pressure Switch. The pressure switch is a protective device that opens and causes the HVAC system to stop operating under certain conditions which may be harmful. It is important to note that when a pressure switch is replaced, it is replaced with the exact switch. The Pressure settings are very delicate and any change in the setting by installing a different switch could cause a safety issue. Used on Models: R801C-MSA_MXA, R801PA-MSA/MXA, R801TA-MSA/MXA.