Just wanted to thank everyone for making this forum such a great location for information on these Monitor Heaters! I may have figured out how to do these repairs on my own, but in the end it was everyone's combined knowledge on this forum that made the task a breeze! I now have a completely rebuilt burn chamber on the 2400 in my house, which was way past due, and found a new appreciation for these simple yet efficient heaters! We have not needed it to much yet this year, but when it runs we have a clean blue flame and no more Error codes! Thank you once again and keep up the information!