What to do if my HTP Boiler water is not hot enough?
- FFrancisco ParkAug 14, 2025
If the water from your HTP Boiler isn't hot enough, it may be due to the water temperature being set too low. Try adjusting the temperature setting to a higher level.

What to do if my HTP Boiler water is not hot enough?
If the water from your HTP Boiler isn't hot enough, it may be due to the water temperature being set too low. Try adjusting the temperature setting to a higher level.
Why is there no hot water from my HTP RT-180 Boiler?
If hot water isn't available when you open a faucet, first, ensure the unit has electrical power. If it does, press and hold the Power button to turn the HTP Boiler ON. Also, check that the gas supply valve is open.
How to restore power to my HTP Boiler?
If there's no electrical power to your HTP Boiler, try these steps: First, reset the plug. If that doesn't work, reset the circuit breaker. If the display panel is blank, unplug the unit or contact an authorized service technician. You may also need to contact the power company.
How to adjust the water temperature on my HTP RT-180 if it's too hot?
If the water at the faucet is too hot, it might be because the water temperature is set too high. Try adjusting the temperature setting on your HTP Boiler.
Why does my HTP Boiler water turn cold during use?
If the water temperature from your HTP Boiler isn't hot enough or turns cold during use, try opening the faucet to allow more water flow. You can also try adjusting the outlet water temperature.
What to do if no water comes out of my HTP Boiler?
If no water is available when you open a faucet connected to your HTP Boiler, make sure the supply valve and the water supply valve are open. If issues persist, turn OFF the unit, close all water and gas valves, and contact an authorized service technician.
Why does it take so long for hot water to come out of my HTP RT-180 faucet?
If it takes a long time for hot water to flow from the faucet with your HTP Boiler, and the faucet is far from the water heater, allow time for the cold water already in the pipes to flow out. Consider having recirculation valves and/or plumbing return lines installed and programming the unit for recirculation mode.
Why can I hear a fan in my HTP Boiler when it's off?
Hearing a fan even when your HTP Boiler unit is not operating is normal. No action is required. You may also need to protect the water heater from freezing temperatures or shut off and drain the unit.
| Brand | HTP |
|---|---|
| Model | RT-180 |
| Category | Boiler |
| Heat Exchanger Material | Stainless Steel |
| Fuel Type | Natural Gas |
| Input BTU | 180, 000 BTU/h |
Covers crucial safety precautions for operating and installing the water heater.
Addresses hazards related to improper combustion and ventilation air.
Safety guidelines concerning gas supply and potential hazards.
Guidelines and considerations for selecting the water heater installation site.
Measures to prevent contamination of combustion air for safe operation.
General rules and requirements for vent and intake pipe installation.
Tables providing guidance on sizing gas supply pipes based on capacity.
Specifications and requirements for connecting the gas supply.
Procedures for setting and verifying gas pressure for proper operation.
Details on electrical connections, grounding, and wiring diagrams.
Overview of the water heater's control panel and buttons.
Diagnostic flowcharts for troubleshooting error codes.
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