Table of Contents
How do you know if a gas valve is bad?
If 24 volts is coming from the board to the gas valve terminals and you don’t hear that little clicking noise the internal valve makes, you could have a bad gas valve. To double-check, take the leads off to the gas valve and check there. Got 24 volts? Then something downstream of that 24 volts is not working.
How do you check voltage on a gas valve?
How to Check the Furnace Gas Valve With a Multimeter
- Turn off the furnace at the wall control.
- Take out the bolts in the service panel on the side of the furnace using a nut driver.
- Pull the wires off the gas valve terminals.
- Turn the test control on the multimeter to “mV,” which stands for millivolt.
How many ohms should a gas valve have?
That’s the common terminal so you’ll leave that there and with the other probe touch one of the other terminals and then touch the other terminal. Both readings should be about 216 Ohms.
What does gas control valve failure mean?
On a gas water heater, the gas control valve contains the thermostat and pilot light controls. Water heater problems that may be caused by the gas control valve include a faulty hot water heater thermostat, faulty gas valve, pilot light that won’t light, and tripped heat limiter.
What should a gas valve ohm out to?
Read the gauge. The reading should change from infinity to approximately 1,300 ohms, plus or minus 150 ohms, when the probes contact. If the reading shows infinity or deviates too much from the 1,300 reading, it indicates a defective valve solenoid coil.
How do I know if my furnace gas valve is bad?
How can I tell if my gas valve is working?
Write down where the wires connect to the valve so you can reattach them later. Turn the test control on the multimeter to “mV,” which stands for millivolt. Hold each tester wand on the multimeter to one of the terminals on the gas valve. A normal reading will be in the range of 145 to 195 millivolts.
How to check the furnace gas valve with a multimeter?
Hold each tester wand on the multimeter to one of the terminals on the gas valve. A normal reading will be in the range of 145 to 195 millivolts. Readings outside this range indicate the gas valve is defective and must be replaced. Furnace gas valves cannot be repaired.
What should I know about the gas valve on my furnace?
Furnaces differ, so please check your furnace installation and service guide for your system’s specifics. This is something you don’t want to get wrong. The gas valve is adjustable. And usually, the installer of the equipment will dial in the outlet pressures on start-up.
Where are the wires on a gas valve?
Look for the two wires clipped to the solenoid terminals on the top or side of the gas valve. Pull the wires off the gas valve terminals. Each wire is connected to a push-on clip that slides off the terminal.