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How to Fix a Stuck Gas Furnace Pressure Switch PDF Print E-mail
Written by Administrator   
Friday, 25 June 2010 13:03
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A pressure switch gas furnace closed to allow the passage of current through the ignition and start the oven. If the switch is blocked, it does not send enough power to the inductor, and therefore, the ignition sequence will not start.

In other words, your gas furnace is so constituted that when you turn on the oven and set the thermostat, the control panel receives a call for heat. The control panel of the kiln is a complex system, which is constructed in the sense that the thermostat was set and there is a call to increase or decrease the heat. Once the Control Board senses the command, it checks pressure or centrifugal switch to see if the switch is open and not under tension. The pressure switch is in turn connected to the combustion air blower. The primary function of the switch is to detect if the combustion air blower is running. The air fan, also known as the induced draft motor, has three main functions. It removes waste gases or other materials in the combustion chamber, blows in a project to get rid of natural gas products of combustion and, finally, provides combustion air to burners.

Here's how you can fix a stuck switch gas furnace pressure.
What you need:

* Ohmmeter
wire brush *
* Fabric own

Step 1 - Check the Control Board

The first step is to examine the control panel and check if the switch is blocked because of an obstacle in his path. The switch is connected to pipes and water in these can sometimes cause a bit of a problem. Check the switch for any type of mechanical blocking. It is also possible for visitors to get stuck because the switch is defective. If you inspect the control panel, also check for faulty wiring.
Step 2 - Check the pressure switch

Use an ohmmeter to check if the switch is opened or closed properly when the heat is needed. First, turn the power off the oven. Then remove one of the hoses and blow it. Now use the ohmmeter to check if the switch is working properly. Suck on the supply pipe, then check the switch again, using the ohmmeter. Check the secondary exchanger and the inducer and see if the exhaust ports are blocked. Also check for garbage in the trap condensate. Then see if you can see the plunger between the switch, check if the piston takes when you suck vacuum tube.
Step 3 - Repair of switch

If your switch is blocked, it's probably a problem in the functioning of the oven. The piston may not be pulling completely and Bob can not there when the pressure builds up inside the oven. With a rag and a wire brush, remove blockages and dirt from the secondary exchanger and the inducer. Remove the drain hose and clean it properly by blowing on it. However, when you blow the discharge pipe, also blow in the secondary exchanger to maintain the pressure. You can also adjust the trap so that water condensation can reach the drain and oven gas can be trapped.

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