lack of heat

andya · 26-01-15, 07:33 PM

Ive put up with this since ive got my 85 cq a year ago. Lukewarm heater. When its a frosty morning it takes ages to demist the windows because the heater is only mildly warm, never gets hot like my old coupe.

Theres no radiator or hose leaks, does anyone have any suggestions.

Many thanks

steveb · 26-01-15, 07:46 PM

I would check the valve that lets the hot water through is opening fully , how hot are the heater hoses, check the thermostate

Ringmaster · 26-01-15, 07:48 PM

Furring up somewhere in the heating system?

andya · 26-01-15, 07:48 PM

Ive replaced the thermostat, no change, the hoses are nice and hot when the engines warm.

andya · 26-01-15, 07:49 PM

Quote:

Originally Posted by steveb

I would check the valve that lets the hot water through is opening fully , how hot are the heater hoses, check the thermostate

Whereabouts is the valve?

Cheers

steveb · 26-01-15, 07:59 PM

Rear of the cylinder head look for the cable attached to it, looks like this, (image from the web)

andya · 26-01-15, 08:01 PM

Thanks for that. Will look at it next weekend. What prompted me to ask is the prospect of an artic blast later this week

steveb · 26-01-15, 08:10 PM

If both the hoses into the heater matrix are hot where they enter the bulkhead the the matrix could be blocked.

andya · 26-01-15, 08:41 PM

Thanks for that tip as well

styler · 26-01-15, 09:27 PM

possible air lock in the matrix, slacken one of the hoses going into the matrix at the bulk head, remember to do this cold!! start the car and remove the hose till the coolant/water flows through, then replace and tighten, make sure heat is on full position... happened a lot on my B2s

26-01-15, 07:46 PM	#2
steveb Senior Member Classic Audi Club Member Join Date: Jul 2008 Location: West Berkshire Posts: 1,155	I would check the valve that lets the hot water through is opening fully , how hot are the heater hoses, check the thermostate __________________ [FONT] '76 Leyland Princess 2200 HLS '79 Scirocco storm '84 WR '89 coupe quattro '01 A2 1.4 TDI SE '14 A3 1.4 TFSI COD [/color][/size][/font]

26-01-15, 07:48 PM	#4
andya Senior Member Classic Audi Club Member Join Date: Aug 2010 Location: Hampshire Posts: 1,149	Ive replaced the thermostat, no change, the hoses are nice and hot when the engines warm. __________________ 1985 Coupe Quattro 1986 Coupe 1.8 weber carb 1987 Coupe 2.2 GT

26-01-15, 07:59 PM	#6
steveb Senior Member Classic Audi Club Member Join Date: Jul 2008 Location: West Berkshire Posts: 1,155	Rear of the cylinder head look for the cable attached to it, looks like this, (image from the web) __________________ [FONT] '76 Leyland Princess 2200 HLS '79 Scirocco storm '84 WR '89 coupe quattro '01 A2 1.4 TDI SE '14 A3 1.4 TFSI COD [/color][/size][/font]

26-01-15, 08:01 PM	#7
andya Senior Member Classic Audi Club Member Join Date: Aug 2010 Location: Hampshire Posts: 1,149	Thanks for that. Will look at it next weekend. What prompted me to ask is the prospect of an artic blast later this week __________________ 1985 Coupe Quattro 1986 Coupe 1.8 weber carb 1987 Coupe 2.2 GT

26-01-15, 08:10 PM	#8
steveb Senior Member Classic Audi Club Member Join Date: Jul 2008 Location: West Berkshire Posts: 1,155	If both the hoses into the heater matrix are hot where they enter the bulkhead the the matrix could be blocked. __________________ [FONT] '76 Leyland Princess 2200 HLS '79 Scirocco storm '84 WR '89 coupe quattro '01 A2 1.4 TDI SE '14 A3 1.4 TFSI COD [/color][/size][/font]

26-01-15, 07:48 PM	#3
Ringmaster Senior Member Classic Audi Club Member Join Date: Apr 2008 Posts: 1,335	Furring up somewhere in the heating system?

26-01-15, 08:41 PM	#9
andya Senior Member Classic Audi Club Member Join Date: Aug 2010 Location: Hampshire Posts: 1,149	Thanks for that tip as well __________________ 1985 Coupe Quattro 1986 Coupe 1.8 weber carb 1987 Coupe 2.2 GT

26-01-15, 09:27 PM	#10
styler Moderator Classic Audi Club Member Join Date: Jul 2009 Location: Donegal, Ireland Posts: 3,443	possible air lock in the matrix, slacken one of the hoses going into the matrix at the bulk head, remember to do this cold!! start the car and remove the hose till the coolant/water flows through, then replace and tighten, make sure heat is on full position... happened a lot on my B2s __________________ CRASH VALLEY CUSTOMS get 'er done...