Where is the fuel filter located on the R40 utilty heater?

too much moisture will cause steel to rust or a low quality grade of steel.

Ive personally never seen a stainless steel tank on a factory vehicle .. i cheap fix is to take a couple old stereo speakers and take the magnets from the back of them , stick them to the bottom of the tank away from the pickup . it will hold the rust particles to that one area and will lesten the chance of them getting through the system . Another cheap yet more time consuming fix is to by Red Kote gas tank liner from your local part store . Drop the tank and clean and coat it .... Otherwise , buy a new tank....

I want you to open the fuel cap up and tilt the heater towards you, and what you are looking for is water in the fuel. These types of heaters will build condensation in the fuel tanks while in storage. Drain your tank in to a clean five gallon bucket, fuel floats on top of the water. Now you can siphon off the fuel just be careful not to siphon to much. Also dry the tank inside as best you can before the fuel is put back in the tank. If this does not take care of the problem it could also be dirty fuel nozzle, use compressed air and blow thru the nozzle for a quick cleaning, make sure to clean the screen out that sits behind the nozzle.

I have several of these in my shop. When they act up it is usually carbon deposits blocking the fire eye. This is a sensor that detects flame, if no flame is present it shuts down the whole heater. Remove the upper cover of the heater and attempt to start it, watch for 1- spark from the ignition sorce 2-fuel being sprayed from the atomizing nozzle 3-ignition of fuel. No spark bad spark plug or ignitor, no smell of fuel or small cloud of fuel, bad fuel filter, no fuel, bad fuel line, bad or plugged nozzle. There are several things that cause this but these are the three most common problems I encounter.

The fuel maybe contaminated,or you need some anti-gel additive to add to the fuel.Check the intake filter in the back,near the pump plate.

It appears that you need more combustion air and check intake filter

The R40 has an on board computer with a photocell that views the flame color. If the photocell does not like the color of the flame, then the heater shuts down....within 5 secs.
Your problem could be:

1. the air pump pressure incorrect..
2. defective electronics.
3. restricted fuel supply.
4. air leak in air line or fuel line

You must troubleshoot each of the above- starting with setting the pump pressure.

Tips http://www.reddyparts.com/HSI_tips.htm

If there is NO fuel then the pump rotor is probably broken. http://www.reddyparts.com/rotor%20replacement.htm


If there is SOME fuel then set the air pump pressure. http://www.reddyparts.com/pressure.htm

If the ignitor isn't glowing it isn't a fuel problem. It may be a pressure switch or bad ignitor.

either you have debris in the fuel line or you need to clean the igniter