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			#1  
			
			
			
			
			
		 
		
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			Hello 
		
		
		
			
		
		
		
		
		
		
		
	
	The heater blows cold when hot is selected, despite new thermostat, bi valve checked over, the hoses either side of where they disappear under the bulk head are hotish, anyone help, winter is coming in the UK???  
			
				
			
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			#2  
			
			
			
			
			
		 
		
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			What year car? several systems. 
		
		
		
			
		
		
		
		
		
			Most likely problem is a heater valve. 
				__________________ 
		
		
		
		
		
	
	MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator  | 
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			#3  
			
			
			
			
			
		 
		
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			Hello 
		
		
		
			
		
		
		
		
		
		
		
	
	1991 230e saloon.  | 
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			#4  
			
			
			
			
			
		 
		
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			When you rev the car do you get heat in the cabin.
			
				
			
		 
		
		
		
			
		
		
		
		
		
		
		
	
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			#5  
			
			
			
			
			
		 
		
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			No but on inspection there is a cold draft in the flow of warm air as though fresh cold air is leaking into the duct.
			
				
			
		 
		
		
		
			
		
		
		
		
		
		
		
	
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