Carrier Weathermaker 8000, Model 58wav111-16 not firing up. The blower goes on and the glow element turns orange, but the gas does not come on. Earlier this week it was giving a code 14. I changed the filter and reset the switch near the flue that has 2 orange wire going to it. Worked fine for couple of days. This the furnace stopped firing up. The light was blinking a code 13. I turned off power and reset switch again. Work for one cycle. I shut off power, cleaned dust off switch and inside rectangular compartment. Furnace blower goes on, ignitor turns orange but no gas and then the orange glow goes away.