W22 heater control problem

[rvronrv]

W22 Dash heater control problem. All of the sudden the heater will only defrost no matter the setting. That happened to me years ago on a Ford class C and it was a chewed thru vacum hose. Could it be the same problem on a W22 chassis? It is a 2002 Dolphin LX.

[DriVer]

Quote:

Originally Posted by rvronrv W22 Dash heater control problem. All of the sudden the heater will only defrost no matter the setting. That happened to me years ago on a Ford class C and it was a chewed thru vacuum hose. Could it be the same problem on a W22 chassis? It is a 2002 Dolphin LX.

rvronrv, The situation that you are describing is not a Workhorse Chassis issue but a coach issue. It is likely that you are indeed experiencing a vacuum leak somewhere under your dash on under your hood at the vacuum reservoir. If you can get at any of the controls on your HVAC see if there is a line there that is drawing a vacuum. It might take a little sleuthing but you should be able to rule out the most obvious things and then close on the problem.

[max49]

Check the easy ones first, mine came off over on the passenger side, very easy to get to, and thats probably why it came off easy.