Hi, my forced air gas heater recently developed a problem. When I have a filter in, the heat will unpredictably stop heating and blow cold air instead. I read about this being caused by a dirty filter and when I took the filter out and reset it worked fine. However when I put a new filter in I have the same problem. I tried the least resistant filter, MERV 4 or 6, and still had the problem. With the filter now out it hasn't happened in over a month. I'd like opinions on whats wrong before I call a repair guy.
This is an older thread, you may not receive a response, and could
be reviving an old thread. Please consider creating a new thread.
DIY Home Improvement Forum
A forum community dedicated to Do it yourself-ers and home improvement enthusiasts. Come join the discussion about tools, projects, builds, styles, scales, reviews, accessories, classifieds, and more! Helping You to Do It Yourself!