Pressostat Huba HC037 65 / 50

A pressure switch of this type confirms that pressure or airflow is within the permitted band and gives the burner control permission to continue the safety sequence. In the system it works between the fan or gas valve and the burner control – an air pressure switch proves the fan is moving air, while a gas pressure switch guards minimum and maximum gas pressure. Parts of this class are selected by the medium (air or gas), switching range and differential, connection thread or hose spigot, contact rating, and approval class. Such switches are available with fixed or adjustable setpoints. When replacing a pressure switch of this kind, check the impulse tube for blockages and the diaphragm for tears – both are common failure points that lead to lockouts that mimic ignition problems. Also verify that the setpoint has not drifted over time; a drifted setpoint can cause nuisance lockouts or prevent the burner from starting. This specific article is listed under the Huba brand, with catalogue number 552.676.020 and manufacturer code HC037 65/50. It belongs to the pressure switch category. No further technical data is supplied for this particular unit, so selection should be based on the application requirements as described above. Always consult the appliance manual for the correct switching range and connection type before ordering a replacement.