I have a Dacor 48" ERD dual fuel range set for LP and need to convert it to NG. Dacor says "NO can do" I know it is not rocket science. Parts people such as appliancepartspros.com first say I need about 5 valves to the tune of $574.00 but need to confirm part #'s with Dacor and then back out and say I have to contact Dacor myself ( been there, done that). Same story with other part suppliers. Can you help?

SOURCE: Dacor SGM365

call a qualified technician

SOURCE: Dacor pgm 365 lp to naural gas

Yes by a licensed person so as not to break any local laws or Kill You,
LPg typically delivers at a higher psi than natural gas, and the propane content requires more combustion air than the methane butane mix of natural gas,
methane CH4 needs 2 oxygen (O2) to make CO2 +2 H20
Propane C4H10 needs 7.5 (02) 4 CO2 5 H2O
the nozzle injecting the LPg has small diameter, The Gas certified plumber can remove the nozzle(s) and replace them with larger diameter Natural gas ones for a small price, most manufacturers make both, its a simple job
Cant stress - Gas Certified plumber/tradesman - strongly enough, one explosion will ruin your whole day

SOURCE: Converting Dacor ERD30S06CH/LP/H to Natural Gas

I know they won't convert gas water heaters but I didn't know they were afraid of stoves. See if your gas company will help. Sometimes they can drill out the orfices. Some of the older repair people still remember how to do this. The orfice for natural gas is larger as the pressure is a lot less. The gas pressure regulator will also need to be replaced. This can be done with a generic part.

SOURCE: Converting LP to NG

The install manual on the dacor web site insists that Natural Gas requires the nozzles be removed, that low pressure NG works with the large 'default size nozzles'. Have done the conversion, in Australia, for my own barbecue, worked ok
Gas is too dangerous to make mistakes with. All I can suggest if Dacor is difficult is take the pdf of the installation instructions, link in the first replies, and the barbecue to a local gasfitter/plumber and ask them to work on it. they will be able to do the calculations from the existing nozzle size, lpg pressure, ng pressure, and required BTU output, to put in correctr nozzles

Dacor Australia are much easier to deal with.
(Now res in Canada,)
Bob