Hydronic System Not Sending Heat(water) for 1 out 4 zone.

I have a GWA-105-N-T and for 1 out of the 4 zones I don't feel any heat in the baseboards of that zone.

Here is the steps I did to test:

1. I turn on the heat in my thermostat
2. I can hear the valve gear turning, then some water(cold at this point) would flow through and I also hear water flow sound for a few seconds at the baseboard.
3. Furnace would start(then stop when it reaches 180f),
4. But the hot water is not reaching the baseboards, and when I touch the pipes around the zone valve , it is lukewarm.
5. Return pipe is also cold.
6. It feels as if the zone value opened then closed by itself? Is that even possible.

Thanks