From the question I understand that the steam jet is rushing into the cup but it is not able to draw milk. The jet of steam pulls the milk from the container (within a reasonable distance from the frother). With proper air mix from the air inlet in the frother, it generates foam. Suction of milk is enough when the milk tube connection at the frother end is airtight. Air sucked into the frother with milk (due to loose connection) reduces the suction of milk. Please try the following: 1- Make sure that the passage of milk between the milk container and the frother is not kinked. 2- Make sure the connection of the frother to the steam outlet is airtight. Air sucked in at this connection also reduces the suction of milk from the milk container. 3- Make sure the tube drawing milk from milk container to the frother is airtight at the frother end. An extra suggestion to a related matter: Many operators feel that the steamed milk is not hot. This happens when the flow of milk id more than the steam can heat. Reduce the flow of milk for hotter foamed milk. First slightly pinch the tube between finger and thumb to reduce milk flow. If that results in a better temperature of milk filling the cup, then you need to find a flow constrictor device. The flow constrictor is a simple bushing with a hole through it to allow milk tube to pass through. There a screw (metal or plastic) threaded through its wall that can be tightened to pinch the milk tube and reduce the milk flow . Please check the following link for the flow reducing device: Services Unlimited Inc Parts Guru
Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/edward_bbd2c7ff4ee1828a
Had this exact problem a few times on a cleaned well maintained milk jug top with an ESAM5500M. Delonghi 'repaired' it by sending a new milk jug frothing top.
It's caused by milk fat deposits, the frother part on the milk jug may look clean but deep inside it's not. I clean mine with pipe cleaners, detergent and hot water and still it wouldn't froth.
The problem re-occurs for me every 6 months or so. You could buy the milk fat remover solution to clean it. Personally I just boil the whole milk jug frother in detergent and the again in descaling solution, that's fixed this problem twice now, although I think it will eventually corrode the 'o' rings on the frother, still cheaper than buying a new frother part each time though.
If it still doesn't work after that, the only other reason for this problem I found mention of was caused by a broken rubber seal where the milk jug fits to the machine. It's most likely to be milk fat deposits inside the frother though.
Answers & Comments
From the question I understand that the steam jet is rushing into the cup but it is not able to draw milk. The jet of steam pulls the milk from the container (within a reasonable distance from the frother). With proper air mix from the air inlet in the frother, it generates foam. Suction of milk is enough when the milk tube connection at the frother end is airtight. Air sucked into the frother with milk (due to loose connection) reduces the suction of milk. Please try the following:
1- Make sure that the passage of milk between the milk container and the frother is not kinked.
2- Make sure the connection of the frother to the steam outlet is airtight. Air sucked in at this connection also reduces the suction of milk from the milk container.
3- Make sure the tube drawing milk from milk container to the frother is airtight at the frother end.
An extra suggestion to a related matter: Many operators feel that the steamed milk is not hot. This happens when the flow of milk id more than the steam can heat. Reduce the flow of milk for hotter foamed milk.
First slightly pinch the tube between finger and thumb to reduce milk flow. If that results in a better temperature of milk filling the cup, then you need to find a flow constrictor device.
The flow constrictor is a simple bushing with a hole through it to allow milk tube to pass through. There a screw (metal or plastic) threaded through its wall that can be tightened to pinch the milk tube and reduce the milk flow .
Please check the following link for the flow reducing device: Services Unlimited Inc Parts Guru
Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/edward_bbd2c7ff4ee1828a
Had this exact problem a few times on a cleaned well maintained milk jug top with an ESAM5500M. Delonghi 'repaired' it by sending a new milk jug frothing top.
It's caused by milk fat deposits, the frother part on the milk jug may look clean but deep inside it's not. I clean mine with pipe cleaners, detergent and hot water and still it wouldn't froth.
The problem re-occurs for me every 6 months or so. You could buy the milk fat remover solution to clean it. Personally I just boil the whole milk jug frother in detergent and the again in descaling solution, that's fixed this problem twice now, although I think it will eventually corrode the 'o' rings on the frother, still cheaper than buying a new frother part each time though.
If it still doesn't work after that, the only other reason for this problem I found mention of was caused by a broken rubber seal where the milk jug fits to the machine. It's most likely to be milk fat deposits inside the frother though.