A belated, Welcome to iRV2.
First post , I see.
Any idea what brand the heater/ A/C system is in your coach.
Acme & Denso are both common , company names are usually cast into the main housing, near the heater hose inlet.
Also, being in the just conversation , forum, your question may not get many views. Class A, or Monaco Owners , would be better.
Maybe the moderators will, move it over for you.
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.