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Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 7603
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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I have a gas heater mod #DGAH056BBSB (brand new). The

Customer Question

I have a Coleman gas heater mod #DGAH056BBSB (brand new). The internal diagnostic light is blinking 4 times (limit switch open). I cant find the switch...could you please help?
JA: I'll do all I can to help. How long have you been dealing with this?
Customer: 3 days. A storm is moving in, getting a little "nippy"
JA: Do you plan on doing the work yourself?
Customer: Yes
JA: Anything else we should know to help you best?
Customer: Nope, its pretty straight foward....
Submitted: 1 month ago.
Category: HVAC
Expert:  Phil replied 1 month ago.

Hello, I am looking for the manual now, however you can find the HL or High limit switch(s) on the units wiring diagram glued inside the blower door than follow the wiring to it on the unit.

Expert:  Phil replied 1 month ago.

Hello, here is the manual for later reference, I will directing you to the limit switches shortly.

http://postrv.com/HVAC/Gas%20Furnaces/DGAA,%20DGPA,%20DGAH,%20DGPH/BDTB,%20BBSB/DGAA%20DGAH%20User%20Info%20Manual%20129099-BUM-J-0112.pdf

Expert:  Phil replied 1 month ago.

Limit switches are item 3 and Item 13 shown on page 9 (system layout diagram)

Expert:  Phil replied 1 month ago.

Its time to locate the 'finish and rate' link and click on it, in exchange I will hold the question open for any follow up that you might need! thanks.