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Only the supply air fan contactor drops out, everything else is running. If I left it on long enough the coil would freeze. There are no errors during this time, just the heartbeat.
Just seems funny...

OK, now that I understand things clearer about the board operation, I found the problem was with the wire going to the limit switch in the blower compartment. The switch was closed, but the insulated...

Thanks!

Thanks, That's awesome!

So I will plan to check all ignition related switches, just wondering why the exhaust motor would be continuously energized unless one of the safety switches energize the motor if it's open....

No economizer

Model DM090N15N2DAA2A
Serial NKLM096199


Customer calls and no AC, go up on the roof and the board flashes 9 times indicating ignition control is locked out and ignition control failure, What??...

Ok, I did the following testing. First time, turned the unit on and watched it till it filled and the first led on the board lit. Then it kept filling, and when water ran out the drain(before the...

Thanks for your help guys. I really appreciate it!

I have a problem with the steamer, water does not shut off after it fills, I have voltage to the solenoid, so I then checked the probes(3). First probe did not look too bad, cleaned it anyway with...

This is a really small Subway walk in freezer, like 6x6x6, no LLSV, just a txv and it's 115v. The first time it did this, I put my hand on it, thinking it was just like slowing down a fan blade, but...

OK, maybe it's not freewheeling, but its sitting there after shutting off and rocks on the springs back and forth for 5 min.... weird.

We used to have lots of KD machines here in SC PA, but over the last 20 years they have all been replaced by Hoshizaki. Sounds like that's a good thing.

Have weird problem Ive never seen before. A small semi compressor on a walk in freezer, after cycling off, it seems as if the crankshaft is freewheeling for about 5 minutes. Doesn't do it all the...

I found a source, they have 3/4 and 1 inch wide and they come in 4 footers and 8 footers. Woohoo!

OK, after doing more research I found another manual for something similar and according to the manual, SH means sensor shorted and the 2 I would guess means sensor number 2 is shorted. parts?

I can't seem to find any info on this thing.This is the second one of these lab units I have encountered with very little info available. One is in a pizza shop and the other one is in a guys house...

Thanks for the suggestions, I was thinking about the new door route

walk in was removed from and old fire hall and relocated to a restaurant. The door frame heater strip is missing at the threshold. Looks like the way it was installed on the sides of the door frame...

I always carry a Q3400A1024 and if it doesn't glow on call for heat I plug in the new one and if it glows, replace it. If it doesn't glow and you have 24 volts coming to valve from four pin...

Intermittent lockout, have yet to be able to catch it failing. It's installed in a piece of tractor trailer washing equipment.

Manual says a minimum of .8 and steady or higher. I have about...

My Ruud distributor has been selling ADP coils for the last 2 years to match up perfectly with Ruud units

This has got to be the biggest pain in the butt I've ever experienced when addressing a "burner shuts off" problem.

Is there an easier way to get to the flame sensor than by cursing at it as you...

As a side note, I do think the "generic" factory replacement heater was too much heat generated and that's why it was 20% of the cost of the exact factory replacement. I usually opt for factory...

I installed a rheostat and that successfully controlled the amount of heat in the frame heater. In my opinion there is no way to have installed the frame heater 2 times and have it nicked in the same...

This freezer is located at a Dunkin Donuts and was broken for a couple years before the owners asked me to rehab it. Lat thing to do was replace the door frame heater and gasket. There is no model...

Thanks for the info, I appreciate it!

The first thing I checked was the oven door switch, I was hoping it would be that easy!

Customer is getting a new range

Convection oven won't come on and I need the wiring diagram to figure out where the problem is.

I appreciate your confirmation on what was about the only choice I had left.

Thanks again

The other day the customer said they were baking a turkey in the oven and it apparently boiled over and knocked out the pilot light. Now they can't get it to stay lit. I went over and the pilot light...

The unit has a counter built on top of it, but I think I can slide it out and take the top off, I think the water and drain are connected with flexible tubing.

Thanks for the info!

The mechanical seal and o rings?

Called tech support today after the customer called and said their ice maker was making a funny noise and had not made any ice all night. I told them to unplug it...

Mission completed! What a pain in the butt! After I finally got the flat top griddle unstuck from the frame it was on and vacuumed up the burnt crap I was able to see where the temp probe went into...

The model number really doesn't matter now, when I talked to Royal they gave me the info I needed to get the right part, I verified it by visual observation and now I just need to know how to access...

Has anybody done this before? This is a flat top on the left side with a conventional oven and a stove on the right side with a convection oven. Sorry, no model number, and I called Royal when I was...

I was thinking about doing that, but didn't....didn't know if it would hurt anything or not....Thanks for the info!!

I replaced the valve plate and that fixed it, works fine and 100% quieter. Could not see any actual broken parts.

Compressor model number KAJB-010E-CAV-100.

Customer calls the other day and says the walk in freezer is making a lot of noise. I get there and it seems to be vibrating excessively. The front right...

Update- got the proper type tubing for the pumps and then used poly tubing to go to the containers and dishwasher. Now I have no back feeding. looks like the surgical type tubing acts as a check...

Update- After stopping over this afternoon I discovered the following:
There is nothing connected to the pumps.

I ran new tubing from the detergent pump to the lower rear connector and into the...

Customer calls and says the chemicals don't feed, in fact the water from the dw is going into the containers. I stop over to look and there is no PRV. I tell the customer to have whoever hooked up...

A small grocery store(owned by people from a foreign country) bought 3-12 foot used sections and they want me to put them together and get a condensing unit for them. I told them I need a model...

Thanks so much for the information, it was extremely educational. I knew the basics about these kinds of controls, but your info has added to my knowledge!


Thanks again,

Tony

Here is a short video of the burner, and I have it turned up to 500. The oven was not running at all prior to me arriving so the only heat in the oven was from the pilot light....

The oven was working fine a few months ago and all the top six burners burn fine. I did take a short video of it, but I don't have time to post it right now.. maybe in the AM. But the flames barely...

I have a Vulcan 6 burner stove with oven and I'm having trouble with a low flame in the oven and it takes forever obviously to bake anything. This is NOT a convection oven. I'm making the assumption...

Got the new plug today and Voila! it works!

Went to start up the AC on a unit unit I installed last November and it would not come on. I had 24 volts leaving the unit and heading toward the economizer, but that was not installed. The jumper...

Thanks!