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Water heat using PEX tubing with Governale Recessed Cast Iron Radiators
My contractor convinced me to switch from steam heat to hot water. They used pex tubing throughout a 3 family house with 4 zones. Installed recessed cast iron radiators on the outside walls of a brownstone. We have had three leaks in the past year due to the system and now two cracked radiators for freezing up in 30 degees weather last week. (It's not even that cold for NY). A recent leak caused sheet rock damage that will now need repair. The original contractor can't find in the pex tubing where the frozen part is. Blames it on the draft in the wall, and wants to wait until it warms up to thaw out. Is this a common issue for water heat through pex tubing? My tenants are without heat and I am at a loss for how to proceed. Any suggestions or thoughts much appreciated!