We recently had a leak in the heater core of our Class A diesel pusher. The repair facility (a large RV sales and repair store) said they had to tear the entire dash apart and it would take 20 hours to complete. The warranty service adjuster said they'd only pay for 10 hours of labor (the paperwork said this was a "covered repair"). The facility asked them to send an inspector out to see the magnitude of the work. Upon arriving, he said he didn't believe the heater core was even leaking and asked the repair facility to hook it back up and show him it leaked (all over the inside of our coach). the facility suggested a leak-down test instead. Once he was convinced it needed to be replaced, he authorized 15 hours ... no more. We had no choice but to have it repaired, so at the end of the day our "covered repair" cost us almost $900 (for the deductible and an extra 5 hours of labor). The warranty did provide some relief so we didn't have to bear the total cost, but nowhere near what was advertised.