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Topic: Trouble shooting guide for Aqua hot AHE 100-02S  (Read 420 times) previous topic - next topic

Trouble shooting guide for Aqua hot AHE 100-02S

I discovered the diesel side of the aqua-hot won't ignite. It makes that familiar initial sound then you hear it attempt but won't ignite. The ac side works fine and I do have heat out of all the registers. Had service done a month ago and worked fine then, new nozzle, chamber cleaned and new filter. I would like to trouble shoot it. Does anyone have a trouble shooting guide for this model? Or if some one could walk me through the process on checking why the diesel burner won't ignite?
Thanks

Re: Trouble shooting guide for Aqua hot AHE 100-02S

Reply #1 –
Attached
1987 Grand Villa ORED
2001 U320 4010

Not all that wander are lost... but I often am.

Re: Trouble shooting guide for Aqua hot AHE 100-02S

Reply #2 –
When checking the continuity across the VDC control thermostat and the VDC  high limit thermostat do you need to unplug the wires?

Re: Trouble shooting guide for Aqua hot AHE 100-02S

Reply #3 –
Busnut, give Rudy a call, he is the go to on a aqua hot!
713-818-3234
Joe & Dottie Allen
Sold!  December 2023.      2000 U320; build # 5645
Our coach " Maxine"
Motorcade #  15922;  Escapee 150950; FMCA F330833; Boondockers Welcome;  Harvest Hosts;  Thousand Trails
'98 U320 from 2000-'06
USAF '62-'66

"Do not spoil what you have by desiring what you have not; remember that what you now have was once among the things you only hoped for." ―Epicurus

Re: Trouble shooting guide for Aqua hot AHE 100-02S

Reply #4 –
Busnet,  I am up just now and take calls between 8 and 8 central time.

When checking continuity on any device, it must be removed from the circuit.  So, unplug one wire from each thermostat your are checking.
Rudy Legett
2003 U320 4010 ISM 450 hp
2001 U320 4220 ISM 450 hp
1995 U320 M11 400 hp
1990 Granvilla 300 hp 3208T
Aqua Hot Service Houston and Southeast Texas
 

Re: Trouble shooting guide for Aqua hot AHE 100-02S

Reply #5 –
Thank you Rudy for taking my call and your help.
Now update after going through the trouble shooting guide and Rudy's help. I got spark, found some wires going to the switch that where not connected properly. Got it fired up. Had a lot of white smoke then cleared out with in 5 minutes. I would expect that after trying several time to fire it up and no spark. I fired it up a few hours later and all was fine no smoke. I went to fire it up the next day. As I was standing near the exhaust pipe. I watch fuel come running out and it fired up. There was white smoke for at least 5 minutes. Now what I thought I fixed I have fuel running out the exhaust pipe and don't know why. I'll have to remove the burner head and check the fuel nozzle