Goodman Furnace Gas Valve Not Getting 24 Volts

If you are not getting 24 volts to the contactor coil then you either have a thermostat problem thermostat wire problem or a safety control problem high or low pressure switch time delay relay.

Goodman furnace gas valve not getting 24 volts.

I did check voltage at 24 volt transformer and have 24 volts. Las vegas air conditioning i. Getting less then 24 volts may 18 volts causing the valve to chatter. If you do not measure 24 volts from w c you should suspect that the ther mostat is not set high enough that it is not working correctly or that a wire between the thermostat and the furnace is open.

When the building reaches the desired temperature a separate signal causes the gas valve to close. You would need to troubleshoot and test using a volt meter to find where the problem is. If you have a gas valve that has a pv pilot valve and an mv main valve then i would think that either you are not getting the 24 volts to the pv since the pilot is not lighting to continue the furnace ignition sequence. I checked all safety stats and have continuity.

This video will help you diagnose and troubleshoot low voltage issues you may be having with your thermostat red wire using your multimeter. Also cleaned th flame switch. As well as f. Is it possible to loose voltage thru the board.

Check directly across the terminals on the gas valve for 24 v ac to test whether the gas valve is getting full voltage a. Maybe no gas to the pilot. Testing with a multimeter lets you know the valve works. Goodman gas furnace intermittent gas valve problem.

For example if the red wire is connected to w on the thermostat the furnace should turn on. In this video i troubleshoot a straight cool ac condenser that does not respond when the thermostat is turned on into cool mode. For example if the temperature in your house falls below the setting on the thermostat such as 68 degrees fahrenheit the gas valve opens to activate the furnace and produce more heat.