Changed filters & after placing panel back on and ensuring it triggered the switch (button) there was no heat. I can hear it clickling (trying to click on) I can make the blower blow on manual, but it appears the pilot lights are out & WILL NOT relight. I have followed the instructions meticulously for hours now, but nothing. I can hear & smell the gas as I am pushing in the pilot light swicth to engage it to light but neither of the dual pilot lights will ignight...HELP!