MHUniversity Portable Radiant

Reflective radiant heat with the warmth of the sun. That is the Portable Radiant heater in a nutshell. These heaters require no electricity and are whisper quiet. With factory installed features, like a tip-over safety switch and a thermoelectric safety valve, the only thing you need to make these heaters the most useful tools you own is a 20lb propane tank. Just hook the tank up to the supplied 10ft hose and regulator, then enjoy the quiet warmth of the Portable Radiant heaters.

Page Contents

Portable Radiant MH35LP Heater FAQs
Portable Radiant MH125LP/NG Heater FAQs
Portable Radiant Heater Manuals and Troubleshooting Guides
Portable Radiant Heaters
Portable Radiant Heater Accessories
Parts Ordering

Portable Radiant MH35LP FAQs

The burner will not light.

Check propane supply tank and connection to the tank to be sure it is tight.

If it is a new propane tank or just a refilled tank, slowly open the propane tank valve all the way, so you don't activate the excess flow valve which reduces or stops flow of LP in hose.

Portable Radiant Clean Pilot Tube

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The unit will not stay lit after lighting pilot and I followed the lighting instructions?

Check connections to tip switch. If good remove wires from the tip switch and using a paper clip connect the two red wire connections together coming off the tip switch to bypass the tip switch. If this works replace tip switch.

Portable Radiant Wires

Portable Radiant Wire Instructions

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After lighting the burner and holding the safety control valve in for 30 seconds the flame goes out when I release the safety control valve.

Check to be sure the connection from the thermocouple to the safety control valve is tight. If pilot still goes out you may have to replace the thermocouple or the control valve.

Portable Radiant Brass Nut

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What is a Safety Tip-over Switch?

A safety tip over switch is a small device inside the heater, that, when the heater is tipped more than a specific number of degrees from upright, will turn the heater off.

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Do you need to order parts?

For your convenience please enter your serial number below to access Mr. Heater’s interactive schematic & parts ordering system. This system will allow you to browse your specific product schematic to order the correct service parts as well as download a complete manual for your make & model year.  If your product was produced any year prior (2011 and earlier), please call our Service Department at 1-800-251-0001, where our technicians will gladly assist you.


Was this helpful?

Don't see your question?

We try to make our FAQs as comprehensive as possible but sometimes things are missed!  We apologize for the inconvenience and ask that you contact us so we may assist you.  You have multiple options to get a hold of us:

1. You can click the "No" below to the question "Was this helpful?" and that will send your question to our Technical Department where someone should respond within one business day.

2. You can call us at 1-800-251-0001 (USA & Canada) during our business hours (standard 8AM EST - 5PM EST but vary during seasons and holidays).

3. You can fill-in the Contact Us form on the Contact Us page and someone should email or call within one business day.

We appreciate you taking the time to give us your feedback and help us imrpove our site!

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Portable Radiant MH125LP/NG FAQs

The unit will not stay lit after lighting pilot and I followed the lighting instructions?

If the pilot flame is blue and touching the thermocouple and the pilot still won't stay lit, then the thermocouple needs to be replaced.

Portable Radiant Diagram

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The flame is mostly yellow and the heater is smoking?

The burner has many holes that can get dirty or clog up. Clean the tile assembly with air pressure of 30 PSI or LESS by blowing up into the tiles.  Then check the supply tubes for any obstruction.

Portable Radiant Burner

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Why does the pilot flame goes out when turning on the main burner?

If you are using Natural Gas you need to be sure you have the correctly sized the hose feeding the heater and enough pressure to the supplied regulator that comes with the heater.

When using LP or Liquid Propane, when turning the LP tank valve on, do so SLOWLY so you do not activate the "EXCESS FLOW SHUT-OFF" safety device inside the POL fitting that screws into the propane tank. Opening the valve quickly will reduce or stop the flow of gas thru the hose and the pilot flame will starve and go out when the main burner is turned on.

Check to be sure you have the thermostat wires connected in the correct place on the gas valve on the heater.  Please see your manual for details (link below to download current version).

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The burner will not light.

Check propane supply tank and connection to the tank to be sure it is tight.

If it is a new propane tank or just a refilled tank, slowly open the propane tank valve all the way, so you don't activate the excess flow valve which reduces or stops flow of LP in hose.

Portable Radiant Clean Pilot Tube

Was this helpful?

What is a Safety Tip-over Switch?

A safety tip over switch is a small device inside the heater, that, when the heater is tipped more than a specific number of degrees from upright, will turn the heater off.

Was this helpful?

Do you need to order parts?

For your convenience please enter your serial number below to access Mr. Heater’s interactive schematic & parts ordering system. This system will allow you to browse your specific product schematic to order the correct service parts as well as download a complete manual for your make & model year.  If your product was produced any year prior (2011 and earlier), please call our Service Department at 1-800-251-0001, where our technicians will gladly assist you.


Was this helpful?

Don't see your question?

We try to make our FAQs as comprehensive as possible but sometimes things are missed!  We apologize for the inconvenience and ask that you contact us so we may assist you.  You have multiple options to get a hold of us:

1. You can click the "No" below to the question "Was this helpful?" and that will send your question to our Technical Department where someone should respond within one business day.

2. You can call us at 1-800-251-0001 (USA & Canada) during our business hours (standard 8AM EST - 5PM EST but vary during seasons and holidays).

3. You can fill-in the Contact Us form on the Contact Us page and someone should email or call within one business day.

We appreciate you taking the time to give us your feedback and help us imrpove our site!

Was this helpful?

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Portable Radiant Manuals and Troubleshooting Guides

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Parts Ordering

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