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We have an Ibis 3 in a brand new van and it was doing the same. Contacted Air Command in SA, they sent someone out to look at it and found it was mounted too close to a wall, resulting in the outlet air being recirculated too soon to the sensor and causing it to cut out prematurely.
Larry
we had same problem. Changed capacitors - not fixed. Changed thermostat and re-gassed - not fixed. Had now spent over $500. Traded the van in - problem solved
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Jenny and Barry
2009 Roma Elegance / 2013 Colorado. Permanent travellers 2011-2015 now just travel for 4-6 mths