Intertherm Heating & Cooling - Recent Questions, Troubleshooting & Support

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InterTHERM model FEH-017HA-04 furnace blower will not shut off.

if temp sensor ok possible stuck fan relay
2/27/2022 4:53:43 AM • Intertherm... • Answered on Feb 27, 2022
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Intertherm inside unit icing while heating

There is no antifreeze in the system. The system is filled with liquid gas and gaseous gas. On the heating cycle, the inside coils should get hot and the outside coils should get cold. In the summer, the heat pump reverses to provide Air Conditioning, the outside coils get hot and the inside coils get cold. They shouldn't really ice up because there is a defrost cycle. You need professional service by an Intertherm technician.
1/2/2022 7:19:52 PM • Intertherm... • Answered on Jan 02, 2022
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I have a intertherm m1m furnace and the red light blinks 2 times indicating the pressure switch is open how do I correct this problem

The pressure switch is a pressure sensing device to ensure the system is operating within the parameters for which it was designed. The pressure switch on the positive pressure side of the combustion air fan when tripped indicates a flu blockage which will limit the amount of flu gasses passing through the heat exchanger. I would suggest checking the flu for a blockage and if there is a second pipe (combustion air), you should check it also as with either blocked, the proper operation of the pressure switches is in jeopardy. You cannot bypass the pressure switches because the algorithym in the control module will see that the pressure switch is in the wrong position at the moment a call for heat was initiated. If there are no flue blockages apparent but you find that there is no screen on the end of the flu pipe or pipes, you may still have a blockage in the form of a dead bird. They like to roost inside the openings of the pvc pipes for warmth, then die of carbon monoxide poisoning and block the pipe. Sometimes they even make their way the full horizontal length and die at an elbow and fall directly on top of the flu opening on top of the furnace. I have had to make numerous cuts to locate blockages before.
12/30/2021 10:08:06 PM • Intertherm... • Answered on Dec 30, 2021
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I have a Intertherm MGHA-075BFC-01, how do I reset the upper limit switch

you don't replace it. google Intertherm MGHA-75BFC-01 upper limit switch for replacements
12/12/2021 3:33:02 PM • Intertherm... • Answered on Dec 12, 2021
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Intertherm furnace MGH 075A pilot light won't light (propane)

check pilot generator possible blocked gas line
11/30/2021 1:00:48 AM • Intertherm... • Answered on Nov 30, 2021
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My Intertherm M1MB 077A BW furnace keeps clicking and burns out the transformer

If it burns out the transformer you have a short on the low voltage line somewhere, use an ohm meter to find the short, start by unhooking the thermostat wire
11/13/2021 8:56:09 PM • Intertherm... • Answered on Nov 13, 2021
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Plate over pilot light on intertherm mg 055a is disfigured is it important?

No that is not a problem.
10/28/2021 3:50:14 PM • Intertherm... • Answered on Oct 28, 2021
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I have a 1987 Intertherm FEH-015HA electric furnace. The issue I am having is that my blower will not shut of unless I pull the disconnect. My thermostat will operate the heating elements like normal,

You most likely have a bad fan limit / cycling switch. If you kill the power to the furnace see if you can trace the wires from the motor to where the connect to the switch. It looks like a round button with tabs sticking out of it for the wires to connect. Mark down where the wires were connected and take it to a HVAC business or furnace supply house. Be sure to have the model off the furnace with you so you can get the correct parts.
10/21/2021 1:05:27 PM • Intertherm... • Answered on Oct 21, 2021
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Model 3EB-015 electric furnace in 2006 Palm Harbor mobile home. Where should correct size filters be installed?

1. Remove the grille that covers the blower compartment 2. At the blower intake, measure the height between the filter guides and estimate the approximate width that will cover the intake completely. 3. Purchase a filter or two with the closest dimensions 4. Install a new filter in the guides 5. Reinstall the grille
2/11/2021 12:28:40 AM • Intertherm... • Answered on Feb 11, 2021
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Mgha-056abfc-02 Owners Manual

Hell no! This is so blown out of portion.
SAY NO TO THE MASK!
1/24/2021 2:54:44 PM • Intertherm... • Answered on Jan 24, 2021
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Model #Mgha-056abfc-05. Why doesn't blower operate?

if when first comes on see if voltage to fan motor if yes bad motor if no voltage bad control board
11/16/2020 2:43:25 AM • Intertherm... • Answered on Nov 16, 2020
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Yellow flame on propane fueled Mobile home heater. Intertherm model MGH 075A. Can’t find any Maintenance manuals. Help

Yellow flame is very bad, not only is it producing soot that worsens the problem but it is also producing an excess of poisonous carbon monoxide gas. Insufficient air is mixing with the gas to ensure complete combustion and in most case a thorough internal clean will be sufficient to restore it to good health, though checking no combustion gas is leaking from the unit is the tricky part. Faulty heaters kill people and mostly they don't even realise it. Ideally you should have the appliance professionally serviced, inspected and certified...
11/12/2020 1:39:41 AM • Intertherm... • Answered on Nov 12, 2020
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I have installed a UPM

oddly enough it has to gas furnace for it to work properly
10/25/2020 1:01:24 PM • Intertherm... • Answered on Oct 25, 2020
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I have an 1974ish Intertherm RV air conditioner and I need a replacement shroud. Model SCH12H, Serial #4JE21SCH12HTT.

https://www.google.com search doesn't apparently provide a shroud for sale, although perhaps someone on an RV oriented web site would be able to assist you. The following web site might be of assistance, but I didn't see that model when I looked. https://www.magicmobilehomesupply.com/Nordyne-Intertherm-HVAC-Parts-s/1827.htm
4/12/2020 1:11:13 AM • Intertherm... • Answered on Apr 12, 2020
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I need to know the age of my Intertherm MAC 1378 furnace to insure my home. I can't find a serial number anywhere. Can someone please help me or, give me an idea of the age of the furnace?

The serial number is located on the data plate.
Here is a web page describing how to decipher the year of manufacturer. (They have used different formats throughout the years).

https://www.building-center.org/intertherm-hvac-age/
4/6/2020 10:24:41 PM • Intertherm... • Answered on Apr 06, 2020
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How do I remove an intertherm Polaris air conditioner? I need to take it out and install it in a different trailer.

Remove the housing inside the rv,and you should be able to see how it is mounted inside,then get on the roof and dismantle the top portion,they are installed in 2 pieces to prevent roof leaks.
11/4/2019 2:20:20 AM • Intertherm... • Answered on Nov 04, 2019
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My A/C blowing air, but

Hello, sounds like it is either a low charge or lack of airflow, what type of filter are you using? sometimes those filters that claim to be super effecient will actually cut down on your airflow and cause the ac to freeze up.
9/20/2019 4:17:25 PM • Intertherm... • Answered on Sep 20, 2019
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My intertherm THERMOSTAT only uses 2 wires i bought a honey well rth6450will it work on only 2 wires

Yes. Make sure you reconnect them as they were
7/12/2019 12:50:52 AM • Intertherm... • Answered on Jul 12, 2019
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