wyofilm Posted March 29, 2020 Share Posted March 29, 2020 I'm back for some great insight. I haven't been able to get our furnace working, yet. Our 2020 EII Oliver has a Dometic (formally Atwood) DFSD 20111 furnace. **I'll get my Oliver gripe out of the way first: their online manuals don't include any furnace manual and of course I didn't receive hard copy manuals with the trailer (online manuals only?). ** When I go to engage heat from the thermostat, I have fan on 'auto' and set a heat temp well above ambient. Fan will kick on for about 10 sec or so. I have had the same results several times. If I look at the furnace by removing the outside cover I see a single flashing light, the code for the flashing is 1 single flash every 3 seconds. From the Dometic manual for this furnace, I see that corresponds to a Limit Switch/Airflow problem. If I turn the unit off, then on, I get the air running for about 10 seconds or so, at which point the unit cuts off and the indicating light comes back on. Here is the rub: we live at 7300'. I have read the previous thread on the Oliver site (observing this problem). Some owners have had no problems, other have. So here is my question (finally!): are my symptoms consistent with this furnace not functioning at high elevation? Is there an adjustment that can be made to rectify the problem? Are there better high elevation furnaces out there? For the record no where in the manual or on Dometics site is high elevation discussed. However, the indicating light (Airflow problem) would be consistent ... I think. Thanks for any help. Jason and Sonja are located in western Wyoming near Pinedale, WY. Oliver Elite II #609 (2020) TV: 2017 Ram 3500 Link to comment Share on other sites More sharing options...
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!Register a new account
Already have an account? Sign in here.Sign In Now