Question about Mr. Heater Natural Gas Garage Heater - 45,000 BTU

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I'm looking for replacement parts such as the gas valve,manifold and circuit board. Where can I get them at a reasonable price or even used. It's a Mr. heater big maxx 45,000 BTU. Model number mhu45ng

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  • Mr. Heater Master
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Try national energy they are on line

Posted on Sep 08, 2010

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6ya6ya
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Posted on Jan 02, 2017

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Pentair mastertemp 250 NA. heater will not fire, no error codes. starts fine, gas flows, igniter heating but still will not fire. It has a new valve, gas pressure entering valve from new regulator is 8.35...


All appearances - No fuel to ignite!
evrything else looks good, proper gas pressure, proper volts at igniter, etc - it should ignite! If fuel present, heater should Fire!
make sure all valves are open.
Gas valve is ON
AND purge any air from gas line.
IMPORTANT ****. If you bled gas line, don't try to ignite for a few minutes. Allow gas to dissipate first, use a fan to help.

Mar 05, 2015 | Pentair Mastertemp 250 Natural Gas Pool...

1 Answer

Hi, I have a pentair minimax 250 pool heater and the burners will not stay lit. The pilot stays lit but burners will not kick in. I have it jumpered on the gas valve to heat the pool but I feel very...


first of all dont jumper the gas valve! if the pilot stayson and the burners wont fire there a a few reasons for that. one of your safeties are open.....malfunctioning potentiometer ( tstat control)......or theres a short or voltage drop through the circuit. ur pilot generator should have around 400 dc millivolts. if you follow the path in the circuit and anything drops to the 200dc mark then theres a problem. make sure ur electrical connectors are tight. millivolt models are garbage, as it takes very little to interupt the circuit

Jun 20, 2013 | Heating & Cooling

1 Answer

GAS TOP WORKS BUT OVEN DOES NOT


This problem is commonly attributed to a defective Electronic Oven Control (EOC), or also referred to as an Electronic Range Control (ERC) board. This is the clock/timer assembly. The ovens on these ranges are controlled by the EOC, and if the control board fails, the oven igniters will not function. You will still be able to use the surface burners, however, as they are controlled by individual electrodes via a spark module. The following link explains how to access and replace MOST control boards: http://www.fixya.com/support/r3727366-replacing_control_kitchen_range A less likely cause would be two bad igniters in the oven. Each manifold (Bake and Broil) uses a separate igniter). As the igniters age from repeated use, they can become weak and no longer function properly. Just because they glow, does not mean they are good. If you are experiencing ignition problems, the following link explains a little theory about how these igniters work and how to replace one:


http://www.fixya.com/support/r3575727-replacing_an_oven_igniter_on_a_gas_range


The burner manifolds in most ovens each use a glow bar or electrode type igniter with a gas safety valve to ignite. If the surface burners work, but the oven does not, the problem is usually not a gas related issue. If a SINGLE igniter is still working (i.e., the broiler still works), its more than likely not a control board issue, either.



NOTE: You CANNOT light the oven with a match because the manifold uses a safety valve that requires a certain current potential flowing through the igniter to open and allow gas flow. This is a designed safety feature that prevents free flowing gas from entering the oven cavity without ignition. Such a condition could potentially create an explosion hazard.

Replacement parts (if required) can be purchased at any of the following websites:

searspartsdirect.com
pcappliancerepair.com
appliancepartspros.com
repairclinic.com

Prices vary between these sites, so shop and compare. The first three sites listed also offer helpful exploded view diagrams to help you locate and properly identify the parts you need.
NOTE: It is common for the BAKE igniter to require replacement more often than the broiler, due to the frequency of use.

If you have any questions please post back and let me know. I hope this helps you.

Jul 26, 2011 | Kenmore 79012 / 79014 / 79019 Gas Kitchen...

1 Answer

Bottom oven not working when you turn oven on no gas seems to be going in rest off cooker fine


This problem is commonly attributed to a bad igniter on the bake manifold in the bottom of the oven. As the igniters age from repeated use, they can become weak and no longer function properly. Just because they glow, does not mean they are good. If you are experiencing ignition problems, the following link explains a little theory about how these igniters work and how to replace one:


http://www.fixya.com/support/r3575727-replacing_an_oven_igniter_on_a_gas_range


The burner manifolds in most ovens each use a glow bar or electrode type igniter with a gas safety valve to ignite. Both oven manifolds are controlled by the Electronic Oven Control (EOC) board, which is your clock/timer on the control panel. If the surface burners work, but the oven does not, the problem is usually not a gas related issue. If a single igniter is still working (i.e., the broiler still works), its more than likely not a control board issue, either.



NOTE: You cannot light the oven with a match because the manifold uses a safety valve that requires a certain current potential flowing through the igniter to open and allow gas flow. This is a designed safety feature that prevents free flowing gas from entering the oven cavity without ignition. Such a condition could potentially create an explosion hazard.

Replacement parts (if required) can be purchased at any of the following websites:

searspartsdirect.com
pcappliancerepair.com
appliancepartspros.com
repairclinic.com

Prices vary between these sites, so shop and compare. The first three sites listed also offer helpful exploded view diagrams to help you locate and properly identify the parts you need.
NOTE: It is common for the BAKE igniter to require replacement more often than the broiler, due to the frequency of use.

If you have any questions please post back with your MODEL NUMBER and let me know. I hope this helps you.

May 01, 2011 | Kitchen Ranges

1 Answer

OVEN WONT LIGHT BUT BURNERS AND BROILER DO. TAPPAN 30-3860-23/03


More than likely, you have a bad igniter on the bake manifold in the oven. As the igniters age from repeated use, they can become weak and longer function properly. Just because they glow, does not mean they are good. If you are experiencing ignition problems, the following link explains a little theory about how these igniters work and how to replace one:


http://www.fixya.com/support/r3575727-replacing_an_oven_igniter_on_a_gas_range


The burner manifolds in the oven each use a glow bar or electrode type igniter with a gas safety valve to ignite. Both oven manifolds are controlled by the Electronic Oven Control (EOC) board, which is your clock/timer on the control panel. If the surface burners work, but the oven does not, the problem is usually not a gas related issue. Since the broiler still works, its more than likely not a control board issue, either.

Replacement parts (if required) can be purchased at any of the following websites:

searspartsdirect.com
pcappliancerepair.com
appliancepartspros.com
repairclinic.com

Prices vary between these sites, so shop and compare. The first three sites listed also offer helpful exploded view diagrams to help you locate and properly identify the parts you need. The part number for a replacement igniter for the model you have listed is 5303935066. The price is about $23. NOTE: It is common for the BAKE igniter to require replacement more often than the broiler, due to the frequency of use.

If you have any questions please post back and let me know. I hope this helps you.

Aug 12, 2010 | Tappan TGFS_63 Gas Kitchen Range

1 Answer

Oven does not light. Top ignitor glows red bottom


Since BOTH oven manifolds and surface burners are usually fed from the same source, this is probably the result of failed igniter(s) in the oven. This is assuming that your surface burners are working, or course. If you are trying to light the BAKE manifold, the broiler manifold is used on some model to speed up the pre-heat process. So, you may see the broiler attempt to light as well. If you have tried using only the broiler by itself and it still does not light, you may have a weak igniter on that manifold as well. Double check your symptoms.

If this is a GAS range, as these igniters age from repeated use, they can become weak and longer function. If you are experiencing ignition problems, the following link explains a little theory about how these igniters work and how to replace one:


http://www.fixya.com/support/r3575727-replacing_an_oven_igniter_on_a_gas_range


The burner manifolds in the oven each use a glow bar or electrode type igniter with a gas safety valve to ignite. Both oven manifolds are controlled by the Electronic Oven Control (EOC) board, which is your clock/timer on the control panel. If the surface burners work, but the oven does not, the problem is usually not a gas related issue. It can be a control board issue, but is usually a weak or failed oven igniter.

Replacement parts (if required) can be purchased at any of the following websites:

searspartsdirect.com
pcappliancerepair.com
appliancepartspros.com
repairclinic.com

Prices vary between these sites, so shop and compare. The first three sites listed also offer helpful exploded view diagrams to help you locate and properly identify the parts you need.

If you have any questions please post back with a complete MODEL NUMBER and let me know. I hope this helps you.

Jul 19, 2010 | Tappan TGF657 Gas Kitchen Range

1 Answer

Kenmore oven won't light


If the broiler still works and the surface burners light, you more than likely have a bad igniter on the bake manifold. The following link epxlains a little theory about these igniters and how to replace one:

http://www.fixya.com/support/r3575727-replacing_an_oven_igniter_on_a_gas_range

The broiler and bake manifolds have separate igniters, but share a common regulator and safety valve. So, if the broiler works, you don't have a gas problem. The surface igniters use electrodes to ignite gas which are fed from a spark module. So, some deductive reasoning can easily determine what the likely problem is.

Replacement parts can be purchased at any of the following websites:

searspartsdirect.com
pcappliancerepair.com
appliancepartspros.com
repairclinic.com

Prices vary between sites, so shop and compare. The first three sites also include helpful exploded view diagrams to assist you in locating and properly identifying the parts you need.

If you have any questions about this repair, please post back and let me know. I hope this helps you.

Mar 05, 2010 | Hotpoint RGB745 Gas Kitchen Range

1 Answer

Maytag Gas Dryer doesn't heat up


The igniter is the part that ignites the gas in the Maytag gas dryer. Long time a go the dryers use to have a pilots. The pilots where on all the time, even when the dryer was not been use.

This wasted a lot of gas and a new design was needed. That is when the igniter or glow bar as is also known, came to be. A bad igniter could be the reason for your Maytag gas dryer not heating.




The radiant sensor is a small black box that attaches to the combustion funnel. The job of the radiant sensor is to allow the igniter to glow until it is real hot, then it shuts the igniter off and opens the gas valve to start the heating process. A bad radiant sensor could the the reason for your Maytag gas dryer not heating.




The gas valve has two coils or solenoids. These coils job is to open the gas chambers inside of the gas valve.

When one of the coils goes bad, the symptom is that the igniter glows, but the gas valve won't open to let the gas flow through the gas chamber to be ignited.

A bad set of coils could be the reason for your Maytag gas dryer not heating.




The hi-limit thermostat is located on top of the combustion funnel, and its job is to open the circuit to the gas valve if the airflow to the dryer is restricted for any reason.




The cycling thermostat is use to control the temperature inside of the dryer. It is factory preset at 155 degree, in other words it will open the circuit to the gas valve when the temperature reaches 155 degrees.

This thermostat is opening and closing all the time the dryer running. A bad cycling thermostat could be the reason for your Maytag gas dryer not heating.




The timer is the part that direct the electricity to the other parts in the dryer. This part works very hard and the contacts wear out and some times they burn out. If the timer contacts won't close, the dryer will not heat.




The motor switch is another safety device that only closes the heating circuit when the motor is running. When the motor is not running the circuit of the gas valve is open and the dryer will not heat. A bad motor switch could be the cause for your Maytag gas dryer not heating.

As you could see, there are a lot of parts inside of the dryer that have to be in good working condition for the dryer to produce heat.

May 27, 2009 | Maytag Dryers

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