Low Pressure Switch Furnace

How to test pressure switch on a furnace.

Low pressure switch furnace.

The diaphragm in your pressure switch is a common location for problems. A pressure switch is designed to sense the negative pressure created by the draft inducer motor during the furnace startup and to shut down the furnace ignition if the air pressure is inadequate. The pressure switch is an indicator of pressure problems in the furnace. A furnace pressure switch is an automatic safety feature located near the motor.

A furnace pressure switch is a safety device located near the draft inducer motor of a gas forced air furnace. Furnace pressure switch troubleshooting. The source of pressure switch problems can sometimes be a pain to track down. This protects your home from dangerous backdrafting which is when exhaust fumes are reintroduced into the system.

In this video i show 3 ways how to check a pressure switch. Also the fittings that the tubing fit into should be clear. Rheem climatek gas furnace vent air pressure switch replacement for part 42 24335 02. 4 7 out of 5 stars 90.

The first method is to measure continuity and resistanc. Which is why i made this video that go. It shuts the furnace down if it senses negative pressure created by the draft inducer motor. 4 7 out of 5 stars 29.

The switch is there to prevent the furnace from running unless the correct venting air pressure is present. Check the tubing from the inducer. Continue reading below our video of the day. A gas furnace pressure switch closes to allow current to pass through and start the ignition of the furnace.

Pressure switches oem parts hvacr parts including air pressure switch 0 60iwc pressure switch kit pressure switch pressure switch air pressure. Pressure switches can malfunction due to age which can prevent accurate readings and result in faulty furnace cycling. Over time your diaphragm can become coated or stiff which reduces its effectiveness. 4 8 out of 5 stars 54.

If the pressure switch is stuck it does not send enough power to the inducer and therefore the ignition sequence does not begin. Other problems that could cause the pressure switch to not open are a dirty blower wheel on the inducer. Coleman 32435972000 furnace vent air pressure switch genuine original equipment manufacturer oem part. It should be clear.