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Recent Humidistat questions

I was reading an old post concerning wiring an April aire

HiJA: Hello. How can we be of help?Customer: I was reading an old post concerning wiring an April aire 400 to a prestige Stat and would like to do the same with mineJA: I'll do all I can to help. Tell me a bit more about what's going on so we can help you best.Customer: I'very got the prestige iaq 2.0 which is a littledifferentJA: Is there anything else the HVAC Technician should be aware of?Customer: NoJA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the HVAC Technician about your situation and then connect you two.

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Brian HVAC Guy

HVAC/R Consultant

High School

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1,386 satisfied customers
We have carrier heating and cooling units with built in

We have carrier heating and cooling units with built in humidistat. My sister keeps turning the humidistat controller all the way to the -20 deg F. Setting/0 % humidity. The controller and manual state you should set the controller to the outdoor temperature and adjust up or down from there. It is summer here. Temps from 70-90 deg. I understand that it is personal preference and condensation on windows, etc...It seems like the "temperature guide" is there for a reason and should be used as the starting point. Am I correct?

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Phil

Consultant to Engrs, Govt & Contractors

Degree, Mech Engr Technology

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9,670 satisfied customers
Wiring a nest thermostat to whole home humidifier which had

wiring a nest thermostat to bryant whole home humidifier which had to wires going to humidity controller nest rerquires one wireJA: Sometimes HVAC issues that that you think will be really complicated end up being easy to fix. The HVAC Technician I'm going to connect you with knows all the tricks and shortcuts. Tell me a bit more about what's going on so we can help you best.Customer: installing nest to rplace old thermostat and humidity controllerJA: Is there anything else important you think the HVAC Technician should know?Customer: one brown one black wire to humidity controllerJA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the HVAC Technician about your situation and then connect you two.

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Airheatman

Heating & Air Conditioning Contractor

6 years college

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9,594 satisfied customers
Looking troubleshooting an A/C issue. Two days ago

Looking for help troubleshooting an A/C issue. Two days ago the A/C would not come on and I pinpointed it to the outdoor unit. The blower in the central unit kicks on, but nothing happens outside - no fan and no sounds coming from the compressor.Central unit is an Amana 80 SSE. Control board is a White-Rodgers model 50A50-298. Outdoor unit is an Amana model RCB30A2C.Yesterday I tear into the outside unit. First I removed and checked the capacitor. Checked resistance on both sides, seemed ok. Using a 9V battery, I tested that both sides would accept and discharge and both did.Next I moved on to the contactor. 240VAC coming in. 0.412VAC across the coil with the thermostat set to cool. If I manually push the contactor in, the unit turns on without delay and quickly starts to blow cold air inside.I completely disconnected the contactor. Checked continuity across the coil. I get a reading of 9 ohms.No I go back and check the control line voltage with the contactor still disconnected. Reading 26.4VAC.Now, at the central unit inside at the control board. Transformer output measures 26.6VAC. R to Y measures 26.6VAC.Can't find a fuse or trip switch anywhere in the system. The control board has an indicator light that is off, which indicates all is normal.Where do I look next?

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Phil

Consultant to Engrs, Govt & Contractors

Degree, Mech Engr Technology

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9,670 satisfied customers
HVAC expert! I've got a Danby humidifier here that

Hi HVAC expert!I've got a Danby humidifier here that constantly claims the humidity of the surrounding room is 36%. I know for a fact that it's between 50-65% based on readings from numerous hand-sized humidistats. Is there any way to adjust the sensitivity or accuracy of a humidistat within a digital humidifier? I've set the humidity level to 30% and the compressor indeed turns on.Thanks, Mike

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Our new TRANE whole house humidifier is not working. We set

Our new TRANE whole house humidifier is not working. We set it on 40%, but it stays around 30-33%. It is model THUMD500APA00CA. The technicians who installed it have been out and insist it is wired correctly, etc., but it is not working.Any ideas?

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Airheatman

Heating & Air Conditioning Contractor

6 years college

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9,594 satisfied customers
I have an attic ventilator fan in an unheated space with a

I have an attic ventilator fan in an unheated space with a humidistat that causes the fan to run in the winter.Other that turning it off, is there a setting that I should keep it set to?

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Airheatman

Heating & Air Conditioning Contractor

6 years college

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9,594 satisfied customers
I just installed a Honeywell HE360 and have followed all the

I just installed a Honeywell HE360 and have followed all the instructions. When the furnace kicks on, the solenoid opens and the water flows. About 15-20 seconds in, the solenoid shuts and then several seconds later, re-opens. It continues to cycle like this until I turn it off. This happens even when I dial the humidistat to fully on.

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Kcrand36

Technician/Owner

Vocational, Technical or Trade School

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144 satisfied customers
I have a Lennox CX34 furnace which already is configured to

I have a Lennox CX34 furnace which already is configured to a HE 360 Humidifier without an air pressure switch. I'm replacing the old HE 360 with a unit that has the pressure switch. The wiring for the old furnace to humidifier configuration had the wiring for the white wire home runned to the hemostat with the red wire connecting to the humidifier at one of the two yellow connections. The red wire coming hemostat is also connected to the second yellow connection on the humidifier. I attempted to set up the wiring as stated in the humidifier instructions however this set seems not to consider the direct connection that already exist to the furnace. I disconnected the humidfier manual wiring and replaced it with the furnace to hemostat configuration. The furnace works however I don't have the right wiring set up for both the furnace and humidifier with air pressure switch to work. Hopefully this all makes sense. Bot***** *****ne, I need the wiring diagram that will work with furnace and humidifier/pressure switch.

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Daniel Plourde

plumbing, hvac technichian

Vocational, Technical or Trade School

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316 satisfied customers
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