DoItYourself.com Community Forums > Heating, Cooling, Air Conditioning, Ventilation and T-Stat Controls > Heat Pumps and Electric Home Heating

upgrading geothermal thermostat

Thread Tools

Search this Thread

03-22-19, 07:42 PM

wwiii

Member

Thread Starter

Join Date: Mar 2019

Location: usa

Posts: 1

Upvotes: 0

Received 0 Upvotes on 0 Posts

upgrading geothermal thermostat

I have a Honeywell T8411R electronic heat pump thermostat and want to replace it It is slow to react when pushing buttons and is a little old. Does anyone know what would be a good replacement? Systemis a Florida Heat pump Geothermal with 2 stage heat one stage cool 24v control Thanks for help

Upvote

03-22-19, 09:44 PM

PJmax

Group Moderator

Join Date: Oct 2012

Location: Jersey

Posts: 63,820

Upvotes: 458

Received 3,743 Upvotes on 3,358 Posts

Welcome to the forums.

Not sure exactly which thermostat would be the best replacement for you. I see the T8411 uses two separate terminals for hot and cold operation as opposed to the one that most use now.

I'd like to see how your current stat is wired. Remove it from the base, take a picture and post it here for us..... How-to-insert-pictures.

Honeywell T-8411R_info (pdf)

Upvote

Thread Tools

Search this Thread

Show Printable Version

Email this Page

Heat Pumps and Electric Home Heating
Heat pump system: air handler blower overheating

S

shonisse on Mar 21, 2019

I have a Goodman heat pump and the indoor fan motor (230v, 1/2hp) will kick the overheat about 1 minute after start up. The fan seems to run fine for that first minute. I changed the start-run capacitor and the motor still kicks the overheat after about 1 minute. This is a three wire motor with the capacitor between the brown START wire and the yellow COMMON wire. I measure 19 Ohms between the START wire and the black RUN wire and 13 Ohms between the COMMON wire and the black RUN wire. The fan spins freely by hand and the coils of the motor show no signs of extreme heat though you can feel that the motor is hot when it shuts off. The motor overheats even if the door of the heatpump is left open letting the fan suck all the air it can and there seems to be normal air flow through the duct work. You ideas are appreciated.Read More
Heat Pumps and Electric Home Heating
Heat pump compressor not starting.

S

s.chasteen on Mar 25, 2019

[left]First hello and thanks in advance for any advice. Unit is a heat pump package Fridgidaire Q3RA-036K I noticed last week the capacitor may be going bad and has been slow to start the condenser fan. So I got new capacitor and also got one for blower motor. Just trying to be proactive and avoid summer failure. Last year also had a ladybug get into contactor that I cleaned. So also got a contactor to replace it while was inside panel. Unit has been running good with no problems other than stated previously. I replaced blower capacitor and dual capacitor 50/5 also replaced contactor. Restored power and thermostat to heat upon call for heat, blower running and condenser fan running compressor not. Cannot even hear compressor trying? So was getting late and starting to rain, hastily I removed new contactor thinking must be bad since was running fine before and capacitor side of fan is working. Put back old contactor sadly same result. This morning checked that contactor was pulling in I have 25 volts across coil and 238 volts supply also 238 volts at T1 T2. So I am at a loss of why could it appear to be correct and again blower and condenser fan but no compressor? Only can guess as possible bad capacitor or did something short if new contactor was bad? Anything that would prevent compressor from running other than capacitor or catastrophic loss of compressor ugh! Can make further readings as needed. I just will have to try a new capacitor as I don’t have a meter capable of checking them. Also capacitor is less than meter at this moment. However, will be purchasing better meter as a result of this experience. Thank you for your time and consideration.[/left]Read More

Ask a Question