Quick question, I have installed a couple of ecobee3lite thermostats using the PEK and installing at air handler so have some knowledge. I am installing 2 on a system with a Honeywell HZ311 controller and no C wire. My question is do I need to install a PEK for each thermostat and should that be done on the controller at t=stat connections? Thanks

York furnace not getting enough gas? White rodgers board 50A50-241, gas valve is also White Rodgers 36E97. When I turn it on the board light comes on for a few seconds and then goes back off. Blower then turns on, after about 30 seconds the ignitor heats up and glows bright. I can hear the gas valve click on and i even get a faint gas smell but there isn't any gas flow coming so after 5 seconds the valve and igniter both turn off. Blower keeps going, no flashes from the board and no more attempts at ignition but blower keeps spinning for a few more minutes. I tested power going to the valve during ignition. I'm getting about 3 Volts when the valve is supposes to turn on and that drops down immediately to less then 1 volt (0.9~0.7 volts). After about 5 second it goes back to 0 as the ignitor also switches off. I testes my transformer and i have resistance on both sides for the 120v and the 24v. Fan, blower, ignitor all come on when there supposed to but looks like I'm not getting enough voltage to the valve. Does that mean i have a bad connection somewhere on my board?