Frost Fighter IDH200QR LP, Installation - Operation/Maintenance Instructions And Parts List

24

IDH TROUBLE SHOOTING GUIDE 

3.

d.   Wires between cad cell and primary control should be checked to see that they are not  

pinched or crimped..

e.   Prime fuel pump by loosening bleeder screw till steady stream of fuel comes out to    

ensure no air or bubbles in fuel line..

f.    

If unit locks out three times in succession, it will go into restricted lock out mode.  

To reset, hold down reset button for 15 seconds until LED flashed twice. The unit will then 
resume in normal operating mode. 

After verifying primary control is not in lockout & light 

continues to flash, replace primary control.

g.  Check polarity, ground & voltage must be between 108-132v AC.
h.  Make sure high limit is functioning properly.

4

.  

Smoky fire

a.   Check nozzle, make sure is tight and not clogged.
b.   Check combustion chamber for cracks or burnt out. 
c.   Check air band settings. (Air shutter and/or air band may be closed too much-restricting 
      combustion air.
d.   Check pump pressure.
e.  Check slide plate to make sure it is in correct position.( See page 9 for settings)If    

necessary, open slightly.

f.    Check recommended settings if using #2 fuel in cold ambient temperatures 

5. 

Delayed ignition

a.   Check for proper electrode setting. 
b.   Check the isolators for cracks or a conducting coat of soot or oil. Cracks sometimes          
      occur under the electrode bracket, causing a short circuit.
c.   Check to see that the air shutter is not overly open-too much air will blow out flame.
d.   Check to ensure pump pressure is properly set..
e.   Change nozzle.
f.    Check fuel filter, replace if necessary. 

g.  Ensure draft or wind is not blowing out flame-add 3’ stack.

6. 

  Main fan will not come on, unit shuts down on high limit.

a.   Check temperature feeler, make sure it is in properly.
b.   Jumper out fan switch to test motor. If you have voltage to motor and still does not start,  

replace motor. Check line voltage to ensure proper voltage. Also checks amp draw on motor. Motor 
may be running too hot and not run due to thermal overload being tripped.

c.    Replace fan switch if you have power on one side after unit heating up it does not make
d.    Replace high limit as it may be tripping too soon and not giving fan switch time to  

engage.

e.   Ensure fan switch temperature is correct for weather conditions ( see page 8 for 

settings)

7

Unit on, but cycles on high limit

a.  Check air flow, ensure both ducts are in place and clear of obstruction and straight.

b.  Check pump pressure, unit could be over firing.

c.

Check nozzle that proper size of nozzle is installed.

d.  Change high limit.

e.  

Maximum duct length with 2 X 12” outlet is 24’ on each side. 1 X 16” outlet,  

length is 45’. Any longer will create back pressure in the unit and trip the high  

limit. *SEE PAGE 2 FOR SPECS*
 

f.   Fuel type- #2 will increase BTU output @cold ambient temperatures resulting in 

     overheating.

8 

Combustion chamber turns red.

a.    Nozzle may be firing side ways (replace or adjust)

b.    Clogged nozzle ( replace)

c.    Temperature feeler not on properly or missing ( Must be touching heat exchanger)

d.   High limit not functioning ( replace)

e.   Excessive pump pressure. Check and reset if necessary

f.    Fuel type-see page 7 for recommended settings.