EasyManuals Logo

Lennox ML180DF045P24A Unit Information

Lennox ML180DF045P24A
27 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #11 background imageLoading...
Page #11 background image
Page 11
7. Ignitor (Figure 6)
The nitride ignitor used on ML180DF units is made from a
proprietary ceramic material. To check ignitor, measure its
resistance and voltage. A value of 39 to 70 ohms indicates
a good ignitor. Voltage to the ignitor should be 120VAC.
See figure 8 for resistance, and voltage check.
NOTE - The ML180DF furnace contains electronic
components that are polarity sensitive. Make sure that
the furnace is wired correctly and is properly grounded.
FIGURE 8
Test 1
Check ignitor circuit for correct resistance.
Remove 4-pin plug from control.
Check ohms reading across terminals 2 and 4.
If value is correct (39 to 70 ohms), this is the only test
needed.If the reading on the meter is not correct,
(0 or infinity) then a second test is needed.
Test 2
Check ignitor for correct resistance.
Seperate the 2-pin jack-plug near the manifold and check
resistance of ignitor at the plug. Reading should be
between 39 and 70 ohms. If the reading is correct, then
the problem is with the wiring between the jack-plug and
the control. If reading is not correct, the issue is the ignitor.
Test 3
Check ignitor for correct voltage
Insert meter probes into terminals 2 and 4 (use small
diameter probes in order not to damage plug).
Check voltage during 20 second ignitor warm up period.
Voltage should read 120 volts +
10%. If voltage reads below
these values, check for correct supply voltage to furnace.
Integrated Control Board
Detail
Test 1
Integrated Control Board
Detail
Test 2
Integrated Control Board
Detail
Test 3

Other manuals for Lennox ML180DF045P24A

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the Lennox ML180DF045P24A and is the answer not in the manual?

Lennox ML180DF045P24A Specifications

General IconGeneral
BrandLennox
ModelML180DF045P24A
CategoryFurnace
LanguageEnglish

Related product manuals