Question about Mr. Heater MHU45NG
I have never used heater as it was installed new in the shop that I just purchased so I do not know how much it has been used.
Check the setting of the control valve and make sure it is not set up for LP gas. Check the pressure switch with a meter and make sure the NO and NC connections read correctly.
Posted on Jan 01, 2013
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
SOURCE: MHU45LP won't fire
The pressure switch to which you are referring is the switch connected to the suction side of your induced draft fan. This pressure switch will have a hose connected between the switch and the induced draft fan. Please let me know if you need any more assistance.
Posted on Feb 17, 2009
my garage heater was working early this winter. I turned the thermostat to 0, but when I went to restart heater nothing happens, can you help me with this problem?
Posted on Dec 27, 2009
Make sure you are using the R and W terminals both at the heater as well as at the thermostat. Try jumping the wires together without the thermostat and see if the unit starts. If it does, bad thermostat. If you continue to get the error code, you may have a bad board.
Posted on Jan 16, 2010
Tips for a great answer:
Mar 21, 2013 | Mr. Heater Natural Gas Garage Heater -...
Oct 02, 2012 | Raypak Rp2100 Pool & Spa Heater Lonox 407k...
Sep 22, 2012 | Jandy Laars LX Pool Heater / 400,000 BTU /...
Jan 17, 2012 | Raypak Rp2100 Pool & Spa Heater Lonox 407k...
Jan 02, 2012 | Raypak Rp2100 Pool & Spa Heater Lonox 407k...
(automatic gas shut-down)
1. Oscillating pump pressure.
1. Clean filter or identify and repair cause of
2. Low gas supply pressure.
2. Identify and repair incorrect supply pipe size
or pipe line blockage.
Refer to qualified service
3. No flame at burners.
3. No flame at burners. 3. Identify and correct
loose wiring connections, or problems with igniter, flame sensor, gas valve,
or ignition control.
Refer to qualified service
info the manual is here:
May 29, 2011 | Jandy Laars LX Pool Heater / 400,000 BTU /...
Dec 10, 2010 | Mr. Heater Natural Gas Garage Heater -...
Jan 28, 2010 | Mr. Heater Natural Gas Garage Heater -...
Oct 13, 2009 | Sterling RF75 Natural Gas Heater (75,000...
May 23, 2009 | Teledyne Laars Laars Lite 2 Pool Heater...
224 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: