You might try a propane place that sells & services appliances to get the regulator's output checked. The folks who I buy propane from on a regular basis checked and adjusted mine for free. All the RV service shops just wanted to replace the regulator. Or you can order your own manometer for about $25 + $10 shipping from Dwyer, inc. The pressure should be about 11 inches of water column with at least two appliances running.
Based on my recent experience, good flippin' luck on getting a new door gasket from Dom-'we-don't-carry-that-anymore'-etic.
Jim, "Women over 50 rarely have babies because they would put them down and forget where they put them."