kellyfrank Report post Posted July 5, 2012 I have a 1999 Dutch Star with two roof Duo Therm's. They do not blow cold, cold air.I believe they need to be recharged Can I do this at home? Share this post Link to post Share on other sites
wolfe10 Report post Posted July 5, 2012 In a word, NO. They are sealed units. To recharge, you would need to solder in a valve. Also, being sealed units, you would have to locate and fix the leak. Have you confirmed that the compressor is coming on and that you have good air flow through the condenser and evaporator? At 13 years old, if this problem is major, were it me, I would replace with new. Brett Share this post Link to post Share on other sites
kellyfrank Report post Posted July 5, 2012 Wow, thanks. That may be a very expensive fix... Share this post Link to post Share on other sites
RVerOnTheMove Report post Posted July 5, 2012 You say it's not blowing "cold, cold air" so I assume it is cooling. The best you can expect is the air blowing out will be about 20 degrees cooler than the return air. If you happen to be in one of the areas around the Country where it's 100+ degrees out your 2 airs may simply not be capable keeping up. Share this post Link to post Share on other sites
hermanmullins Report post Posted July 5, 2012 Frank, one thing you may try is cleaning the coils. you can get the correct material at almost any AC supply house. Be careful on the roof. Herman Share this post Link to post Share on other sites
wolfe10 Report post Posted July 5, 2012 Please let us know that the A/C compressor is coming on and both ambient temperature at the air return and out the A/C vent. Also, if this is at your same home outlet where you are having electrical issues, get those electrical issues resolved before troubleshooting the A/C. You will sure want to verify that you have 108- 132 VAC with the A/C running, correct polarity and good ground. Share this post Link to post Share on other sites
