Question about Reddy Heater-30-55,000 BTU Variable

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I am looking for the pressure required for a Reddy heater 40. Can you help me out?

Fan motor turns on, fuel is flowing, igniter is not glowing. Eye wires were disconnected from circuit board, eye reads 60 ohms, igniter reads 200ohms. I am not seeing any sign of malfunction in the circuit board.

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Jerry Magee

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1 Answer

Heater will not start


Does the blower motor start when you plug it in/turn it on? It may take around 5 seconds if your heater has a HSI(hot surface igniter). If it does you need to check the igniter and the fuel flow. Either way, remove the top of the heater. You will be able to see the fan, igniter, and fuel nozzle. Turn the fan by hand to see if it turns freely. If it does, watch out for the fan and turn the heater on. Look for the igniter to start sparking (spark plug type) or glowing (HSI type). Next, use a flashlight to look for fuel spraying from the nozzle. If fuel isn't spraying, try cleaning the fuel nozzle and check the fuel filter. Watch out for the HSI, if you have one, they are very brittle and easily broken. If you still don't have fuel flow after cleaning the nozzle and the fuel filter, you may have an air pressure problem. Let me know and I will tell you how to check it. Don't forget to rate the answer if it works.

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Heater glow plug ignites and blower comes on but no fuel ignition.After a few seconds the motor cuts off and glow plug goes out.


You should check for fuel flow. Remove the top of the heater. Watch out for the fan and turn the heater on. Look for fuel spraying from the nozzle with a flashlight. If there isn't any, clean the fuel nozzle and check your fuel filter. If this doesn't get your fuel flowing, check the air pressure going to the fuel nozzle. You will need to connect a pressure guage one of the ports on the airfilter cover. The plug with a small hole in it is for adjusting the air pressure. Remove the other plug and install an air pressure guage (0-15 psi). The air pressure you need should be listed on the label on the heater. If you can't get that pressure, check the air filter. Let me know what you find if this doesn't get you going and I will give you some other things to check.

Jan 01, 2011 | Reddy Heating & Cooling

1 Answer

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1 Answer

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does this unit have hsi tech? i think so and if so the photo eye must see the glow from the igniter be for fuel discharge, otherwise the heater would fill the aera with and explosive mixture, try to cotton swalve the photo eye making sure of no obstructions first, i seen a mudd dopper make a nest in one before.

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