Honeywell CECOMINOD032202 FBA C7735A1000, Gray

The fix is simple and can be done by yourself. As a result, I avoided an overpriced HVAC service call and saved a few hundred dollars. The three thermostats in my 3-bedroom house were the source of my concern An old multi-generational house While the air conditioning systems were all requesting cool air, neither the compressor nor the flow of air was happening. According to online professionals, the problem was not the typical start capacitor or contactor failure, as those are the typical causes of this problem. can also be tested very easily with a Fluke 117 or similar multimeter, as well as a few simple diagnostic procedures. The DIY style also applies to them You can replace them with little difficulty if you follow the relevant There was no 24V signal to turn on the compressor, as there wasn't a 24V signal. I found out that my Honeywell 3 wasn't working It was flashing the green COOL light rather than holding steady ON. The contactor was not receiving the 24V ON signal because the zone controller (HZ311) was doing so. I could see the answer from one glance at the manual of the HZ311. It was mistakenly believed the system was overcooled because the controller thought the duct temperature was below 45F. Due to the cooling system being off for a day, it wasn't possible to reach that temperature. Here is what you need to remember A system is designed to shutdown if a sensor fails, so that no irreversible damage is done. Having suspected this DATS (duct air temperature sensor) was malfunctioning, I used this method to check. By disconnecting one wire of the suspect DATS from the controller I was able to confirm this. Immediately after my compressor started, I was able to reactivate my air conditioning. A later time, when the temperature got to the goal, the compressor turned off. ordered the part and installed it a few days later when it arrived. My system continued to function flawlessly since then. It is not longer possible to read the duct temperature as 45F degrees. In my testing, I compared and measured the resistance of the old and replacement sensors and found a vast Approximately 300 times as much resistance was reported by the old sensor as by the new one. More than 3 megaohms were read.

Johanna Goldberg

| Jun 13, 2021

During the weekend I had a technician I was unable to turn on my heat. The doctor could not find anything wrong with the machine. It worked for 2 hours, then ceased working for no apparent reason 2 hours later. The hz322 allows you to look at the digital sensor readings since I am an auto technician, so I assumed the sensor was bad since the fan ran continuously yet the furnace did not fire. On top of that, it was 192 degrees 24 hours a day. I ordered this from Amazon and I It's so nice to have a furnace that works! As well as a note It's strange that this sensor does not have a rubber gromet to seal the tube. Texas is a state where air conditioning is used 90% of the time. condensation gets into this sensor, especially if it is vertical like mine was. For a simple fix, I used the Delco Packard Rubber Weather Pack Seal to isolate the wires from the tube. Solving the problem is the right thing to do.

Alaiya O’SULLIVAN

| Aug 29, 2020

There has been a strange noise coming from my 4 zone ac system. In one zone, it would freeze me out, and in another, it wouldn't allow me to run. This is when the blinking Cool light on the zone control board let us know there was a problem with the thermometer. I have had nothing to do with the other one since I was 16 and it suddenly started acting It is easy to remove the old one and replace it with this one. We need to fix all the warning lights as soon as possible. As soon as they are used, the HVAC zones operate normally. This part allows you to save a lot of money.

Adalee Jacobs

| Jun 21, 2021

The technician was on time and the fact that I bought it online and installed it myself (my daughter actually began installing it) saved me about $350 (and several days without air conditioning). These sensors seem to fail every 12 years or so, by the way. Within the last 1 or 2 days, I've had 2 fail. Heating and air conditioning units that are around 13 years old usually last for 5 years.

Tiana KAY

| Jun 11, 2021

A fix has been made for my issue with the AC turning off after a few minutes. It had only been in existence for two years. Almost ordered the entire Honeywell zone panel after narrowing down the selection to Honeywell zone panels, but noticed on the panel display that the DATS low limit message had been displayed, which shut down AC is working fine now after disconnecting DATS. I probably could have left it like this, however, since the sensor was reasonably priced. I simply replaced the sensor and AC is functioning as.

Leila Branch

| Oct 01, 2020

The Honeywell Controlled Multi Zone HVAC System calls for this exact setup. many times in the past, and every time it has worked exactly the way that was.

Tate Olsen

| Jul 11, 2021

It worked Despite what the AC guy recommended, I did not need to replace the whole board. This can be easily replaced.

Carolyn Schwartz

| May 19, 2021

This is the product that we purchased and installed onto our system after experiencing issues with temperature control. We have been using our system successfully for a long time.

Nalani Collins

| Apr 10, 2021