Dash heater barely working
I know that in my old gas burning cars the failure of the dash heat to warm up was almost always due to a bad thermostat. That may well be the problem with my 2006 DP, Cat 350 Phaeton. Naturally, chan...
Forum Discussion
1. In the old days, when a engine tstat "Failed" it was because it stayed OPEN and the water flowed thru the radiator with no restriction and the result was Cool/cold Heater output. The tstat in Gas engines acts as a restrictor also. If it failed CLOSED, your engine would then overheat
2. Motorhome Heater controls are all after market. The only thing the engine does is send the hot water forward to the Dash Heater assbly
3. So, if your dash gauge shows correct temp range, your engine/tstat is not the culprit
4. Unless you have had some type of work done on the engine, the manual coolant valves at the engine should not be a concern
5. The most COMMON cause of your problem, is the Dash AC Heater Control valve. It has probably failed or is clogged up. You need to go open the front hood and find and post the BRAND of the Dash AC system. IF you have an Evans Tempcon system that is easy to fix. But, Tiffin started using the Denso system years ago and I think you have that brand. Doug
2. Motorhome Heater controls are all after market. The only thing the engine does is send the hot water forward to the Dash Heater assbly
3. So, if your dash gauge shows correct temp range, your engine/tstat is not the culprit
4. Unless you have had some type of work done on the engine, the manual coolant valves at the engine should not be a concern
5. The most COMMON cause of your problem, is the Dash AC Heater Control valve. It has probably failed or is clogged up. You need to go open the front hood and find and post the BRAND of the Dash AC system. IF you have an Evans Tempcon system that is easy to fix. But, Tiffin started using the Denso system years ago and I think you have that brand. Doug
