How to Troubleshoot Gas Control Valve Solenoids

What You'll Need
Screwdrivers and other tools as needed
Brush for cleaning clogged oil or dirt.
Replacement valves.

It is important for everyone to know how to troubleshoot gas control valve solenoids in their homes. If solenoid valves are malfunctioning, dangerous pressure might build up and cause damage. There are four possible reasons for solenoid valves malfunction: coil burnout, failure to open, failure to close, or solenoid valve noise. The following steps will show you how to troubleshoot gas control valve solenoids.

Step 1 - Check for Coil Burnout

Coil burnout can be caused by continuous usage in high heat conditions. A burned out coil will exhibit unnatural electrical characteristics that are over or under its normal voltage levels. An extremely low voltage in the system will result in stalling of system parts like the plunger that will result in drawing more current than is needed. Check also for parts such as coil housing and plate, enclosing tube, sleeves and/or plunger to see if these parts are present and functioning correctly. Lastly, watch the plunger in action to see if any deformity in the enclosing tube is interfering with the plunger’s movement.

Step 2 - Check for Failure to Open

A solenoid valve that is filled with drudge might fail to open. Disassemble the valve and clean it out with a brush or rag. If this doesn’t work, read the nameplate MOPD rating. The ratings listed must align with the pressure rating shown on the valve. Lastly, a low voltage can be the problem for its failure to open. Voltage applied must be 85% of the rated nameplate voltage. Recheck for tight connections to supply lines for good distribution of voltage.

Step 3 - Check for Failure to Close

Electrical circuits can be closed because of faulty switch or relays. Repair and replace these as needed. If this does not work, check for old oil that has congealed to the valves. Clean the interior of the solenoid valves and change the oil to the right type of oil that will remain fluid in the temperature present in the system. Also, another possibility that might prevent closing is a damaged pilot port. Check the pilot port and replace as necessary.

Step 4 - Check for Solenoid Valve Noise

A partly opened solenoid valves produce noise that is carried loudly by the pipes in the system and can become aggravating. This kind of noise is produced either by excessive pressure, oil, gunk that blocks the valve open, or low voltage. Another cause for valve noise can be a loose coil or housing. Tighten the coil and its housing to get rid of this sound.

By knowing these troubleshooting steps, homeowners will know how to prevent it from becoming a bigger issue in the future or, if it is a problem that is not readily solved, when to call the professionals.