Hot water tank does not seem to be heating up after replacement of elements and thermostat?

We have replaced the heating elements and thermostat on a electric water heater for ouw home.It doesn’t seem to be heating the water at all.There is power going through all the things we replaced.We checked that .What else could be wrong?…Or does it take like 12 hours for the start up tank of water to get up to temperature maybe?

In Massachusetts are you notified if a contractor put a mechanic’s lien on your house?

I have a multi-family and the furnace wasn’t working which heats a tenant apartment and my space (tenant’s heat is included). I called a heating contractor which I had used before and they sent someone over. This was their last chance to redeem themselves since the last time I had a problem I wasn’t impressed by their work. Anyway the technician checked out the furnace and told me the wire from the thermostat to the furnace was bad. I also had an electrican scheduled to do work that day so I had him check it out. The electrician told me the thermostat was bad. I replaced the thermostat and the furnace works now.. I am seriously considering sending the heating contractor’s bill back to them with a note stating I shouldn’t have to pay since they were wrong.