Hi, we are renting and have no hot water. We have a water wizard on the outside of the house. Should we have connected with a gas company? Or does it run on something else?

Do you live in a climate where the hot water line could have frozen? If your heater did freeze up, that could be very bad. This is because water actually expands when it freezes and can do a lot of damage to pipes and to the water heater itself. My other thought is possibly a clogged in line water filter. But typically a clogged water filter would make it run with reduced pressure rather than a complete shutdown all water flow.

First, I don't even want to know why someone would put a tankless outside as you have found out...really bad idea. In order to help you, more information is needed. Is this a gas or electric unit? Or a gas unit with electric controls? Is it mechanically or electronically controlled ( a make and model would help). Are the water lines to or from the tank exposed? When you say no hot water coming from the tap does that mean when you turn on the hot water faucet you just get cold water or no water?

Call the company who installed it.
If you are renting, there will be a contract that specifies cost for repairs and updates.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Absolute danger here:

1) Call gas company IMMEDIATELY to check for gas leak that can cause explosion and fire.

2) Call plumber immediately to fix improper combustion or improper vent before toxic combustion by-product kills family.
Gas appliances must vent toxic by-product outside and away from home where the gasses will kill the planet instead of you.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Can't address other issues, but WATER pressure should be 40 to 80(I'd say 70)lbs. tester at home D for $10-15. Goes on hose Bibb outside, or at washing machine cold valve.

In New Zealand, the Bosch 960 Water Wizard has a maximum temperature of 55 degrees celsius, for safety reasons, check with your local gas fitter or plumber to see if your system has been set correctly. If water feels hot through some taps in the house, but not others, then there is a good chance your water pipes are not insulated, meaning that the heat from the water is escaping out through the pipes before it gets to the shower, for example. As far as I am aware, there is no way to manually adjust the water temperature of a Bosch 960 Water Wizard, it has to be done by a certified professional gas fitter. Recommendation: Get a more up-to-date gas water heater, that doesn't require a manual restart each time the pilot light goes out.

If this water is coming from the pressure/temperature relief valve on your tank type water heater, and it is piped from inside to outside of the house, you could try pulling up on the lever atop the pressure/temperature relief valve and releasing it. See if it sets properly. It may have to be replaced if I understand your problem accurately.
Gary

It could be a water pressure problem but most water supply companies put out enough pressure for a 2 story house (or even 4 stories) easily. Can you clarify what you mean by continuous? Does the water get cold, on and off (i.e. no hot water) or does it vary in temperature mildly?

try to remove pipe you could have a clog water,ice,nest. also you may have a bad pressure swith hose find the hose and **** to see if it will fire
also if you take your pipe of you make turn on to see if you get fire you can not run for more then 30 sec with this off co. will fill the house.

Its A Possibility The Left Over Water In The Hot Is Frozen. If Your Line Is Exposed Outside Somewhere It Can Easily Freeze Up. Turn On The Hot Water Everywhere In The House And If Accessible Check The Lines To See Where The Warmth Ends. You Can Leave One Off Over Night In Hopes That It Will Eventually Defrost.