I have an Olsen BAS125 Heating Furnace. The pilot light keeps blowing out. I have replaced the Pilot thermal cupling. How can I fix it?

You are saying blowing out, it could be that the standing pilot is a little dirty and doesn`r have a strong enough gas pressure to pilot, could be pilot is not tall enough or the end or thermocouple isn`t into the flame very well,, it could also mean you have a cracked or bad heat exchanger and the blower is feeding back through it and blowing out the flame,, which is a really bad thing