2009 E350 weak heat
#1
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Thread Starter
2009 E350 weak heat, not the usual suspects
Car has very weak heat. Heat trickles out if I run the fan on a low speed, cools quickly if I set to "auto" or turn the fan up higher. Had a code for the heater valve, replaced with genuine from FCP. Figured I had a bad L/F SAM, replaced with a used one from a reputable Ebay seller (Garageman Inc), no change. I have a DAS3, checked ACC functions, no errors reported. Replaced electric circulation pump (even though I could hear original working), no change. Car otherwise functions properly, temp comes up to normal as it should, A/C charged and working
Clogged heater core? (seems unlikely) Broken blend door flap? Suggestions/experiences welcome
Clogged heater core? (seems unlikely) Broken blend door flap? Suggestions/experiences welcome
Last edited by scotterikson; 02-12-2022 at 04:47 PM.
#2
2007 E350 heater control valve
Car has very weak heat. Heat trickles out if I run the fan on a low speed, cools quickly if I set to "auto" or turn the fan up higher. Had a code for the heater valve, replaced with genuine from FCP. Figured I had a bad L/F SAM, replaced with a used one from a reputable Ebay seller (Garageman Inc), no change. I have a DAS3, checked ACC functions, no errors reported. Replaced electric circulation pump (even though I could hear original working), no change. Car otherwise functions properly, temp comes up to normal as it should, A/C charged and working
Clogged heater core? (seems unlikely) Broken blend door flap? Suggestions/experiences welcome
Clogged heater core? (seems unlikely) Broken blend door flap? Suggestions/experiences welcome
Last edited by dvenneman; 02-12-2022 at 11:40 PM. Reason: Misspelling