nominated for egv107...

 

Seconded...

 

Nice job, making fast work of those spare parts.

 

Thanks Flip, great spare part service from Florida! The passenger door seal is done also...will write with detailed pics later - have to go bed now.

BR

 

Nice job and thank you for this information.

The unit in my 1979 450 SLC is cracked and needs to be replaced all together. Can you suggest where I might find a used one ?

 

You have a different system.

 

I have a used monovalve that works but I don't think it's worth the postage. Just buy a new one - they are not expensive.

 

I'm still at this. I have been having a time of finding a new unit and have been looking all over the place for one.

My car is a 1979 450 SLC if the monovalve you have will fit this vehicle I would be interested in purchasing it, that's if you still have it.

Thanks
Al English
203 561-1495

 

Monovalve repair question

Thanks to all who replied !! Can I check if the mono valve is the issue by diconnecring the electrical connector and see of the ac gets cold ? Idealize I wouldn't have any heat . Would this be a way to check before I replace? Thanks to all for helping this newbie!!

 

Monovalve repair & auxiliary fan

Thanks to all who replied!! It looks like I will be shopping for a monovalve!! Any idea about the aux fan? When should it come on? I jumped the wires at the dryer and the fan did work !!! Thanks again for helping a newbie!!!

 

Thanks to all who replied!! It looks like I will be shopping for a monovalve!! Any idea about the aux fan? When should it come on? I jumped the wires at the dryer and the fan did work !!! Thanks again for helping a newbie!!!

No. When electricity is disconnected (turned off), the valve is open to let hot water thru. disconnecting the monovalve electrical connector is akin to "turning the heat on"...

 

If the housing is good you just need the repair kit. MB # 000 835 06 44
Mercedes A 0008350644 Mono Valve Repair Kit | Compare Prices

 

87 560 sl ac not cool

I took the advice and purchased the mono valve repair kit. Thanks to all who provided instructions. Unfortunately, it did not solve the problem. I put the climate control system on heat and it did heat up after a few minutes. then I switched it to ac, and the temp goes down but it is still warm. I put a meter on the connector at the monovalve and it appears I have 12 to 13 volts no matter if I put ac or heat on. Is that correct? do appear to have some bubbles in the sight glass, but I was afraid to overcharge the system. It was converted to 134a by previous owner and I do not know what the gauges should read on the low and hi side. Does anyone know what they should read? The compressor engages as soon as the button is pushed!!!! Any help is greatly appreciated!!!!

 

I am still at this. I purchased the repair kit for the monovalve, but still no cool air. First, I cannot get the electric cooling fans to kick on unless I jump the wires?

 

Hot to fix AC problem in funny way ?

Last year my AC was perfect,but this year I turn AC on,and hot air keep blowing from my vents.So I recharge the AC (was low little bit) and still no cold air.I have a long trip tomorrow (Sunday) and there is no way to get bosch mono valve by then and I need AC for my trip.So I fix that temporary for 10$ in 5 minutes.Just bought valve for water in the hardware store and That's it.If I want heating work again I just pop the hood and turn valve back.And I make new never seen before,pre merger AMG part.?????

 

In case you are driving in winter and need some heat in the car before you can make the repair, I discovered that if you just remove the electrical connection to the mono valve assembly you will get constant heat. This worked for me with my 86 560 SEL